Definition of foolproof | Bee Dictionary of English

How does the X7 make foolproof crema? "Pressure--this is the old story," says Andrea Illy, 43, a grandson of the company's founder.
The ad industry has already run into trouble with the Federal Trade Commission for doctoring Brand X to ensure foolproof inferiority.
User reviews are helpful but not foolproof, so keep in mind the following tips: Read between the lines, asking yourself if the writer shares your mind-set, or if a negative .

Award leaks, Final game day; more
• Surprisingly, the names of the major award winners are leaking out before tonight’s presentation. But the plan was foolproof! Foolproof! • Can tonight’s Game 2 possibly live up to the hype generated by Game 1? I’ve already called in sick for Monday, just in case.
June 15, 2013 - Sports Illustrated
Top Line: NHL award winner leaks; Stanley Cup Final game day; more links
• Surprisingly, the names of the major award winners are leaking out before tonight’s presentation. But the plan was foolproof! Foolproof! • Can tonight’s Game 2 possibly live up to the hype generated by Game 1? I’ve already called in sick for Monday, just in case.
June 15, 2013 - Sports Illustrated
America’s Test Kitchen From Cook’s Illustrated: The Best Blueberry Pie
Above: Test kitchen chef Bridget Lancaster shows host Christopher Kimball how to make a blueberry pie filling that is firm and full of fresh, bright flavor and still-plump berries, and uncovers the test kitchen’s secret to a foolproof pie dough recipe that bakes up tender and flaky every single time.
June 15, 2013 - KPBS San Diego

Barack Obama in Detroit Free Press
There is, of course, no foolproof solution,Obama said. "As we develop new screening technologies and procedures, our adversaries will seek new ways to evade them, as was shown by the Christmas attack. In the never-ending race to protect...
Michael Chertoff in SunHerald.com
Each of these steps raises the bar to an attack. None of this is perfect. None of them is foolproof. But we're always better off when we build higher levels of security,Chertoff said.
Sarfraz Nawaz in International Herald Tribune
In a situation when no cricket team was ready to come to Pakistan, the Sri Lanka team was promised foolproof security of VVIP level and that promise was not kept,Nawaz said. "This a security lapse and taking this responsibility the...