![]() ![]() TRUEĮxplanation: Since a valid argument cannot have even one instance with true premises and a false conclusion, all such arguments are invalid. Some dogs are cats All arguments with true premises and a false conclusion are invalid. Our example is an invalid argument with false premises and a false conclusion. FALSEĮxplanation:Arguments with false premises and a false conclusion can be valid or invalid. Example:Īll mice are cats All arguments with false premises and a false conclusion are valid. Our example is a valid argument with false premises and a false conclusion. FALSEĮxplanation: Arguments with false premises and a false conclusion can be valid or invalid. TERMS IN THIS SET (49) If an argument has false premises, then it is invalid. There should be consensus among experts about the claim. The field must be one in which there is genuine knowledge.ĥ. We can only appeal to an authority regarding claims within their field of expertise.Ĥ. The authority must be generally recognized by experts in the field.ģ. ![]() But when they are relevant, we still need to question their adequacy:Ģ. Appeals to Authority In many cases, appeals to authority are irrelevant. I think they were probably messing with me, but you never know. I decided not to go swimming in the lake today because some kids told me that a bunch of toxic waste had been spilled in it. ![]() Consequence of the Argument Sometimes it is okay to accept weak arguments if the cost of doing so is insignificant, but the potential risk of not accepting it is high. While this lends some support to the conclusion, whether it is adequate depends on information about Mala's high school team (maybe they all sucked), as well as her college team. Therefore, we can expect that she will do well in college basketball. Mala was the best basketball player on her high school team. No support Strict Proof Content of the Argument Whether an argument is adequate depends on what it is about (content). Therefore, 40.7% of UO students have part time jobs. #TRUE CONCLUSION FALSE PREMISES REGISTRATION#Upon registration the UO asked every student whether they have a part time job.We can conclude that approximately 36% of all the students at the UO have part time jobs. In a random sample of 1000 UO students, 36% were found to have part time jobs.Therefore, roughly half of UO students have part time jobs. Of the 10 UO students I asked, half had part time jobs.Therefore, all students at the UO have part time jobs. Jackie has a part time job and goes to the UO.The first argument is adequate, the second isn't (at least if taken literally). Therefore, it must have rained last night. We often warn against "jumping to conclusions."īefore we can assess an argument's adequacy, we need to ask what degree of strength it claims to have.ġ. TERMS IN THIS SET (66) Adequacy Even if our argument has true premises that are relevant to the conclusion, those premises may not be adequate to support the conclusion. ![]()
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