What is "logical proof"

Usage examples of "logical proof".

But without all that faffing around with infinity, he wouldn't have known where to start and his logical proof wouldn't have got off the ground.

This letter at once assumed in his eyes the aspect of a logical proof.

Perhaps it has no philosophical verity, but the things men live by are rarely subject to logical proof.

I had not succeeded in giving a purely logical proof that the friendship of the alert and highly intelligent Terrans would be of great benefit to the State.

Giacometti sat back on his barstool with the air of a man who'd completed a logical proof.

Some, too, have baffled his analytical skill, and would be, as narratives, beginnings without an ending, while others have been but partially cleared up, and have their explanations founded rather upon conjecture and surmise than on that absolute logical proof which was so dear to him.