Formal Logic Quickies from Around the Net

Here I want to put screenshots of various social media posts containing examples of reasoning used in categorical syllogisms. I will add to this list as I collect more.

Double Negation

FYI: This was on Super Bowl Sunday.

not {not[not(Bb)]} …is that right?

Fallacy of Affirming the Consequent

It’s not clear to me that this was intended as a serious argument.

Modus Tollens

I take this to be a refutation of the theory that Antifa was behind the insurrection of January 6th. There is of course a missing premise and a missing conclusion, but I think both are easily construed.

Here, we are interested in the tweet by New Scot for Indy ref2. The first message is provided for context. This tweet is in response to aspects of British policy. Likely, this is part of the fall out for BREXIT, but I don’t know the details that well. Note that there is some extra commentary at the end, but the argument is basically Modus Tollens.

This appears to be a summary of a larger argument made in the video linked below it. The moral argument for the existence of God is largely the contribution of C.S. Lewis who presented the argument in his book, Mere Christianity.


It’s not clear to me that this was intended as a serious argument.

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