Question by GRD: Philosophically speaking is this a petitio principii fallacy and is the following sentence a weak analogy?
“A dog barking, is a dog barking, is a dog barking.” (Is this a petitio principii fallacy or is it merely repetition?)
“The obnoxious phenomenon described above is neither difficult to recognize nor subject to esoteric advanced study, such as rocket science.” (Can this be a weak analogy fallacy even though the statement is basically saying “it isn’t comparable?” Why or why not?)

Best answer:

Answer by Harish

petitio principii fallacy looks like this:

X is a Dog
(Why?) Because it is barking

The sound that X produces is barking.
(Why?) Because a Dog’s sound is called “bark”.

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