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Contest could well be short of 'concurrent testing'
(sopuli.xyz)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
The "Con" in both is from a Latin root meaning together.
The "test" in contest is from Latin testis, meaning "witness", from a root meaning "three" (as in, a third party).
The word test is from Latin testum meaning earthen pot, because metals could be tested for quality by melting them in such a pot.
Etymology is super interesting to me.
Testify!
Ok, let me go get my earthen pot.
Speaking of testis… should I worry I only have two?