It’s “proof” as in to test. Like “proof reading”. The point being, the real test of how good something is, is to use it (for its intended purpose).
A vaguely similar sentiment to when people say “eating your own dog food” (or words to that effect) to mean testing something by using it themselves. Albeit the pudding proverb doesn’t necessitate the prover to be one’s self like “dog fooding” does.
A vaguely similar sentiment to when people say “eating your own dog food” (or words to that effect) to mean testing something by using it themselves. Albeit the pudding proverb doesn’t necessitate the prover to be one’s self like “dog fooding” does.