Consider all. Test All. Hold on to the good.

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Conjunction (and)

Any two propositions P and Q can be conjoined, producing the new, complex, proposition:

P and Q

The proposition P and Q is true if and only if both P and Q are true. It is false otherwise.

P Q  P and Q
T T   T
T F   F
F T   F
F F   F

About Stephen Downes

Many kudos are owed to Stephen Downes, the logician who originally authored this list of fallacies and made it freely available on the Web. His basic structure remains. A mirror of Downes' original site can be found here.