"Right now we're operating on the assumption there's no rational motive, that he's psychotic."

Barabas also has a rational motive for hating Christian society.

"There's no rational motive that I could imagine."

I don't think it's the work of a mentally disturbed killer -ninie likely someone with a more rational motive.

It might be a more rational motive than murdering for a person; less risk of subsequent disenchantment.

The king's departure removed all rational motives for resistance.

But there has to be a rational motive, so just tell me why.

But a rational motive comes from the high volume of passenger traffic at Japanese metropolitan stations.

Father's theory provides the first rational motive we've found.

This burning desire of his was something greater than any merely pragmatic or rational motive.