It is impossible to remember everything, so a process of winnowing must take place somehow.

ECONOMIST: Memory formation

It is impossible to secure everything.

WSJ: William Bratton: A Cop's-Eye View of Terrorism

Today it is impossible to be an expert about everything, yet the medical profession do not appear to have properly sub-divided their skills into contemporary areas of knowledge for the purposes of giving evidence in the courtroom.

BBC: Read your comments

Instead, the company's selling SteornLab testing equipment to other organizations working on magic fairy-power rotary and magnetic systems, and it's also got plans to sell something called "ZeroF passive magnetic bearings" later this year -- we'd assume ZeroF means "zero friction, " which is nicely impossible and totally in line with basically everything Steorn stands for.

ENGADGET: Steorn returns, promises to open Orbo specs, give you a pony

The law basically says that you must do everything you can to fulfill a contract, unless it is all but physically impossible to do so.

FORBES: Collateral Damage

"We must do everything to prevent the Church from becoming Kafka's castle, where it is impossible for the messenger to get word out to the world, " he said.

BBC: Pope Francis leads Good Friday services in Rome

The marketplace is moving so fast that it has become almost impossible to stay current and informed about everything that one should.

FORBES: 5 Things Leaders Are Thinking, But Not Talking About

Long-term default is all-but-impossible, as those issuing loans for higher education have the right to garnish everything from tax refunds to Social Security checks in their quest to be paid back.

FORBES: Casey Anthony Can Declare Bankruptcy And Expect Relief But Student Debtors Receive No Such Protection