Originally Posted by
redietz
I agree with you that his logic was very flawed, even if do think that color is low on the importance scale.
I think you're making a possibily unfounded assumption in your truth table (which remind's me of Pascal's wager) and that is that "wager for color" necessarily means that flies are more effective if color matters. Let's assume for sake of argument that color does matter. What we perceive as the correct color (in a fly that is not yet wet) may look entirely different to the fish, especially after it's wet. Wager "for color" if this is case may cause us to not try a more effective fly which doesn't appear to us to be correct.