an acid test

a test which will really prove the value, quality, or truth of something The new show was well received but viewing figures for the next episode will be the real acid test. The acid test for the product will be whether people actually buy it.

Common Names:

Name	Pronounced	Usage
Rashad	-	Arabic, Azerbaijani
Iman	-	Arabic, Persian, Indonesian
Berhtoald	-	Ancient Germanic
Otis	O-tis	English
Pasquale	-	Italian
Tarou	tah-ṙo:	Japanese