1. If It's Green Or Wriggles, It's Biology. 2. If It Stinks, It's Chemistry.

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1. If it's green or wriggles, it's biology.
2. If it stinks, it's chemistry.
3. If it doesn't work, it's physics.
4. If it's incomprehensible, it's mathematics.
5. If it doesn't make sense, it's either economics or psychology.
-- Handy Guide to Modern Science

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