But sound logic helped me again.

It was sound logic, that Jerry backed by repeating Ardlan's dying statement.

That is sound logic: no multivalued problem has only one solution.

Martel corrects himself: Apparently sound logic is wrong.

There is sound logic in the strawman proposal.

Certainly this was sound logic, in that day, at least.

More than once that intuition had kept him alive, where sound logic would have got him killed.

The method per se cannot be vicious, as sound logic always must keep within its own boundaries.

That was sound logic, and the project was abandoned almost as soon as it was formulated.

Getting Estabrook to bring her here had been a spur-of-the-moment inspiration, but there was sound logic behind it.