Where's the Vulcan logic in this course of action?

Let's bring a little cool Vulcan logic to the problem, okay?

I believe he was the one element that Vulcan logic could not predict.

I never thought I'd have to fall back on Vulcan logic, but our pointy-eared friend here has the right idea.

Human wit and Vulcan logic were just about all that they had.

"I know it's an inconvenience to your Vulcan logic to have this link with a human, but just tell me!"

"Any of your Vulcan logic have anything useful to say about women?"

It would be most interesting to see how Vulcan logic held up to whatever primal communication was being attempted here.

Like Vulcan logic and honor, it was, not surprisingly, common to both universes.

Kirk had seen this form of Vulcan logic at work before.