the.com/acid test
The one experiment that can't be argued with, bribed, or spun.
means A decisive trial that reveals whether something is genuinely as good, strong, or true as it claims to be.
from From actual chemistry: prospectors and jewelers tested whether a metal was real gold by dropping nitric acid on it — gold shrugs the acid off, while fakes corrode and blister. By the early 1900s, 'acid test' had leached into everyday English as a metaphor for any trial that exposes the real thing from the imitation.
- origin
- literal nitric acid test for real gold
- gold rush
- fake gold corrodes, real gold shrugs
- modern use
- any trial that exposes true quality fast
- irony
- metaphor now outlives the chemistry it describes