Questions tagged [validity]
110 questions
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valid or invalid: “S or R. Not S and Not R. Ergo, B.”
“Either it is sunny or it is raining. But now, it is neither sunny nor is it raining. So, the Boston Bruins will win the Stanley Cup this year.”
Is this argument valid or invalid? I’m pretty stumped, but I’m going to say invalid because the premises…
A. Delarge
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Are valid arguments content blind?
Piggy backing off of this post here I want to make sure I understand this point clearly.
Are valid arguments content blind?
Even if the conclusions they make contradict?
For example, the following 3 arguments are all valid (as they use modus…
fgharo91
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Can p and q in modus tollens be stated negatively?
In a youtube video a commentator summarizes Andrew Klavan's argument as
the following:
If God does not exist, there are no objective moral values.
There are objective moral values.
God exists.
The commentator says it takes the form of modus…
fgharo91
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1
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1 answer
Is this an argument by simplification: it can be done by doing Y, therefore it can be done?
The problem is X
This problem can be easily solved by doing Y
Therefore this problem can be easily solved
I am confused if this is Simplification (Which means the inference is Valid)
Grandene
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Is this argument about "either or" valid or invalid?
Unless something weird has occurred, either the basketball game is cancelled, the football game is cancelled, or Churchill never entered Switzerland. If any game is cancelled, then something weird has occurred. Nothing weird has occurred.…
A. Delarge
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1
vote
0 answers
What is a faster method other than truth tables for validating a sentence?
I've learned how to do truth tables with the different syntaxes (conjunction, disjunction, etc.), but when it comes to 3-5 atomic sentences it takes too long to do a full truth table with 8-32 lines. Is there another way to come to a conclusion if…
K.Wong
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Can an argument be valid if one of its premises is invalid?
I know that an argument's validity has nothing to do with the truth of its premises, but does it have something to do with the validity of its premises? I'm thinking specifically of where a premise is itself a syllogism.
For example:
P1. (A → B) ∧…
Michael
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Valid and invalid arguments
I have an assignment that asks: Can an argument have false premises and a false conclusion and still be valid? false prem and a true conclusion? true prem and a true conclusion? true prem and a false conclusion?
I responded with:
False premises,…
Peter
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