If I Touch A Match To A Mixture Of Chemicals And An Explosion Occurs,
I Don't Set A Second Mixture Aside To See If It Will Blow Up Without
The Help Of The Match.
If I touch a match to a mixture of chemicals and an explosion occurs,
I don't set a second mixture aside to see if it will blow up without
the help of the match. The effect of the match is obvious.
-- Walden Two