Strongly related to "kids say the darnest things". The kind of logical considerations one would typically expect from a young child. From a simplistic perspective they may seem rational, but usually will not hold up under a more mature or approach to reason or fact.
Example 1: Kid Logic

"Every year I get a little older and a little taller. Someone who is very old must be a giant!"

Example 2: Kid Logic

"An adult said it so it must be true!"

Example 3: Kid Logic

"Peter Pan can fly, so can I!"
by Logic With A Twist December 21, 2011
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