It is considered to be a purity test by many.

As a member of clan Tamblyn, he knew all about water extraction and purity tests.

A purity test should also be conducted whenever there is discoloration or a change in odor or taste.

At school the next day, the halls are in chaos as kids have learned the results of everyone else's purity test.

Wallace Fennel tells Veronica that he scored a 70 on the purity test, which he feels is too high to be considered cool.

"A 100 percent ideological purity test - I don't live in that utopian world; it's not reflective of the real world," she added.

Irritated specialists from the International Rescue Committee say the water has passed five key purity tests.

There doesn't seem to be a single one, even among the "leaders" who could pass the racial, religious, or radical purity test.

Online purity tests were among the earliest of Internet memes, popular on Usenet beginning in the early 1980s.

Most purity tests have possible scores anywhere from 0% to 100%.