Excuse me, but if I push on a block of wood and you push on a block of wood and we both have equal strength, given your arguement, neither of us would be expending energy. However, I think in half an hour you would say otherwise, no mater how balanced the forces are.
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If I only could remember half the things I'd forgot, that would be a lot of stuff, I think - I don't know; I forgot!
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Some of my webcomics. I've got 400+ webcomics at Last count, some dead.
Sig updated to remove non-working links.