Still, it provides a clear test case.
One clear test will be the national meeting of United States bishops scheduled for Dallas in June.
But smoking could prove the clearest test yet of the behavior modification pitch.
Measuring profits the good old single bottom line offers a pretty clear test of business success.
Such a meeting, he said, would provide a clear test of whether Mr. Arafat had put violence behind him.
Science is based on the idea of a hypothesis and testing, but there is no clear test to prove or disprove the existence of a god.
In 2012, Nevada offers a clear test case for the economic debates and changing demographics that will determine this election.
"All future cuts in personal taxation must pass one clear test: do they help people on low and middle incomes get by and get on?
There could hardly be a clearer test case of what, if anything, 12 years of bruising encounters with public-sector reform have taught it.
This has long been assumed to be the basis of the taste of bitterness, but that theory has only now been put to a clear test.
There is no clear test for when evidence rises to the level of being "exculpatory," thereby requiring the government to disclose it to the defense.
