they can recognize the biological markers of it.

seriously? biological markers? like what?

elevated heart rate, pheromones, that kind of stuff...besides, they don't marry for love. They marry if the match is logical.

di ba spock's father said he said he loved his wife? *confused*

Vulcans are not without emotion completely. They still have emotions, they only control them. In fact, a Vulcan whose emotions are left

unchecked are quite...brutal.

as Spock demonstrated... but he's already half-human... his father, how'd he know?

To be able to control something requires that you know it first.

yeah... but how'd he know it wasn't just because it made so much sense?

I'll ask the next Vulcan I meet.

sorry... demanding ko ba for an explanation?