The scientific answer is that we know things are likely to be true because they have been repeatedly tested.

In that experiment 19 enlisted men were repeatedly tested over a period of six weeks.

Or maybe they didn't really have a problem with Armstrong, per se, who has been tested repeatedly and come up clean.

For all new and future cosmetic products during the testing process six hundred people are tested repeatedly.

Throughout the lengthy debate "Lincoln's political skills were repeatedly tested".

And she worried that, even more than most children, these girls would repeatedly test the Thornes' limits.

New designs must be tested repeatedly to get out the bugs and avoid failures in war.

Evidence suggests that repeatedly testing yourself on the information you have learned can enhance retention considerably.

New types of nuclear arms must be repeatedly tested, and their designs improved as flaws are found.

These chemical libraries are sets of compounds that can be tested repeatedly.