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Examples of common logical fallacies
Examples of common logical fallacies
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Logical Fallacies
Fallacies, in terms of logic, are forms of flawed thinking. They are obstacles—weeds in the garden of the mind, which can be difficult to distinguish from the plants if not closely observed. The nature of fallacies falls in with our nature as human beings—they do not like to be discovered and plucked any more than we like to be the ones to admit that we are incorrect. Accepting responsibility for our actions, and in this case fallacies in our thinking, is the first step to change. Thus, if we can overcome our human pride and admit our flaws to ourselves, we are then empowered to correct them. Therein lies the value of examining these fallacies, which is an important component of studying critical thinking.
Fallacies can be
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Not being able to see what is there would be considered “suppressed evidence”—this is one of the three main types of fallacy. Without acknowledging all of the contributing factors of a particular situation, we cannot possibly come to a valid conclusion.
If an argument or statement of fact is really true, it will welcome all evidence rather than withhold it. A typical example of the category of suppressed evidence would be the fallacy of “False Dilemma”. It may look something like “If Jimmy goes to bed, he can have a cookie. If he does not go to bed, he will not get a cookie. Therefore, Jimmy will either go to bed with a cookie or stay up without one.” This argument fails to take into account important evidence—that Jimmy could possibly steal a cookie and stay up, or perhaps he will be put to bed with to cookie at all. Either way, there are a multitude of outcomes that could come from this situation; not just two. We as humans tend to leave out important evidence in order to create the result we
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This is a category of fallacy known as “Questionable Premise”. For instance, “Mike is a murderer. Therefore, Mike deserves to be punished by law.” Well, if the premise is true, than this argument holds water… but many courts have been established in order to investigate that premise! With no evidence, there is absolutely no reason to believe a premise that is just given to us, even though the easy thing to do would be merely to accept the premise as truth. This fallacy can be easy to spot from a
With all these possible flaws in the testimony of witnesses and victims why do they continue to use them as primary evidence in criminal cases? The answer is simple; until recently there was no other way to prove whether or not a person was actually at the scene of a crime unless someone saw them or they left some finger prints behind that the police were able to link back to someone, which may have not been left on the victim but in the general vicinity. Until recently, with the recent breakthrough in DNA testing which allows police and investigators to gain an exact match as to who committed the crime.
Kassin, Saul, and Lawrence Wrightsman (Eds.). The Psychology of Evidence and Trial Procedure. Chapter 3. Beverly Hills: Sage Publications, 1985. Print.
This form of accusing holds zero form of justice. The accusers weren’t even able to explain what happened themselves, so instead of worrying about t...
Kelly James Clark, who is a former Professor of Philosophy at Calvin College, wrote “Without Evidence or Argument” which is published in Reason and Responsibility: Readings in Some Basic Problems of Philosophy. The article starts off with the scenario of a stranger giving a man a note that his wife is cheating on him. However, there is no evidence and her behavior has not changed at all, how should he react? Does he take the note as complete truth and confront her or should he find security in the trust that he has built up with his wife over the past years together (Feinberg 138)? Clark uses this example, as well as others, to bring attention to the connection between significant beliefs and evidence. Furthermore, Clark goes on to state his
In the play Doubt, by John Patrick Shanly, Sister Aloysius is treating Father Flynn unfairly. Sister Aloysius is the principal of St. Nichols School, who is suspicious and always doubt everyone, especially Father Flynn. She thinks that Father Flynn is guilty, but has no proof. Sister Aloysius doesn’t like Father Flynn in the school and his ideas. She treats him unfairly. Sister Aloysius treats Father Flynn unfairly when she still accuses Father Flynn of giving the altar wine to Donald Muller after Father Flynn tells her the truth. She treats him unfairly by forcing him to request the transfer without proving if Father Flynn is guilty or not and also makes him resign by lying about his past.
William Clifford author of the “Ethics of Belief” creates the argument that it is always wrong for anyone to believe anything upon ‘insufficient evidence’. What does Clifford define evidence as and what is sufficient? Clifford’s argument is more scientific. Basing our beliefs off methodical approaches. If we base all our decisions off sufficient and what we declare to be reliable then what do we stand for? We have our own credentials to believe things even if we do not know why. These beliefs could be innate and
1. Hypothesis - A hypothesis is defined by the Criminal Justice Today textbook as "An explanation that accounts for a set of facts and that can be tested by further investigation. Also, something that is taken to be true for the purpose of argument or investigation" (Schmalleger 73). It is, essentially, a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. In terms of law and criminal justice, The Law Dictionary website defines the term as "A supposition, assumption, or theory; a theory set up by the prosecution, on a criminal trial, or by the defense, as an explanation of the facts in evidence, and a ground for inferring guilt or innocence, as the case may be, or asindicating
Introduction Critical thinking provides an opportunity to explore the positive and negative sides of an argument for and against an idea, theory, or notion. Reasoning and perception is attuned to personal impression and provides outcome to belief and opinion. The dictionary term and understanding for the word ‘logic’ is “of sound thinking and proof by reasoning” (Merriam-Webster, 2009). Logic is the examination of the methods and doctrine used to determine ‘correct’ from ‘incorrect’ and is used in the structure of an argument.
There is no way to measure how everyday people of the jury compartmentalize the information given to them. By disregarding information, does it work in favor of justice or does it highlight a forbidden topic. Using a jury trial and the disregarding of evidence played a key role in the OJ Simpson case that began in 1994 (Jasanoff: 714). Just after a year of his acquittal of the first case, he became the defendant of a civil suit placed by the relatives of the victims. When asking juries to disregard statements and evidence can change their decision-making abilities, especially if the evidence directly links the alleged criminal to the crime as it did arguably in OJ Simpson’s case. During this trial, the defense tried to highlight and find errors in the Los Angeles Police Department’s procedures for collective and transporting evidence (Jasanoff: 715). The evidence, which was once connected to the trial, was now inspected to establish both its validity and reliability. The outside influence of the evidence played a role in the decision, which included the credentials of the lab and their procedures. In sum, the jury’s roles in legal proceedings emphasize the influence of the everyday nature in the law. In these cases, the jury has much more control on the case rather than the law controlling their
without evidence is justified for "genuine options" because belief in a fact is necessary for
How can anyone make an informed decision on any subject when the evidence is not released to the public?
In order to understand how to compile evidence for criminal cases, we must understand the most effective types of evidence. This topic is interesting because there are ample amounts of cases where defendants have gotten off because of the lack of forensic evidence. If we believe forensic evidence is so important and it affects our decisions, then maybe we need to be educated on the reality of forensic evidence. If we can be educated, then we may have a more successful justice system. If we have a more successful justice system than the public could gain more confidence that justice will be served. In order to do this, we must find what type of evidence is most effective, this can be done by examining different types of evidence.
Pennington and Hastie (1992) found that when jurors were presented with the evidence in a chronological manner, they were much more likely to find the defendant guilty than when this evidence was given in a discrepant and non-structured way. This led them to propose a story model which is believed to be widely used by jurors to make sure they evaluated all the evidence in a strategic and sensible way. The model consists of creating a narrative based on a careful evaluation of all the collected evidence to assure that the jurors fully comprehend the case. This appears like a fairly reliable system to assess a crime. So why so much controversy? Yet again we should remind ourselves that jurors are untrained laypeople and as laypeople they do not always use the most systematic way of approaching incoming information. This might for example occur when the presented information is out of the jurors’ expertise and they are having hard time making estimations about the extent of a crime; in that case they are more likely to rely on heuristic processing (Bornstein & Greene, 2011). This is quite a rapid and automatic process enabling people to use shortcuts that help them to understand the issue better. When using this technique, jurors are more likely to attend to the peripheral cues, such as the confidence of an eyewitness, credibility of an expert,
For example, according to a CNN article entitled,” 'Blue-eyed butcher ' sentenced to 20 years,” “A medical examiner testified he was able to count 193 wounds on the body, with the actual number of stab wounds well in excess of that” (Jakobsson, 2010, para. 6). Pictures were also presented to the jury to show the disfigured body. Another piece of evidence leading to the conviction of Susan Wright was the autopsy done that showed drugs in Wright’s system. The author of CNN stated, “They also suggested she may have drugged him with gamma-hydroxybutyric acid, known as the "date-rape drug," low levels of which were found in Jeffrey Wright 's system” (Jakobsson, 2010, paragraph 10). One last conclusive piece of visual evidence was the presence of two of Jeffrey’s ex-girlfriends. “Misty McMichael testified Wright beat her repeatedly during their two-year relationship and tried to control her every move” (Jakobsson, 2010, paragraph 13). McMichael also claimed that Wright had pushed her down the stairs 104 times and at one point even locked her in a room (Jakobsson, 2010, paragraph 14). This evidence was in favor of Susan Wright. The impact of this visual evidence was significant in many ways. Evidence is proof and proof cannot be made up, only misinterpreted. Therefore, the excessive amount of stab wounds found on Wright’s body along with the drugs found in his system was
Now we will look at the Fallacies of Irrelevant Premises, these fallacies are mostly when the premise is unrelated to the conclusion, or appealing to something other than reasoning, some of the Fallacies of Irrelevant Premises are Appeal to Force as in, do so or I will break your leg; Appeal to Pity as in, I was feeling emotional that’s why I got a bad grade, please can I retake the quiz, here there is no reasoning just an appeal to feel bad for the speaker. Also there is several other fallacies of irrelevant premises like appeal to emotion, straw man and beside the