What Jesus is noting is not a legal impossibility, but a psychological one.

The application was dismissed on grounds of legal impossibility.

Laying claim to a landscape, however characteristic, is a virtual legal impossibility, as Tuscan legislators are well aware.

It held that the will was void as a legal and physical impossibility because of Martin's blindness, or as being an attempted fraud on the state.

Mercifully, it was a legal impossibility.

(Impeachment, despite current speculation, is a legal impossibility.)

At best, the city would abrogate the contract and start over, but that's probably a legal impossibility.

This is a legal impossibility.