I'm sure there is a 'rational' [='sensible, reasonable'] explanation for his decision.
Humans are 'rational' beings. [=are able to use reason when thinking about something]
No 'rational' [='sane'] person would behave like that.
(..) You're looking for a bomb. But the threat was made on the Federal Building. They have that covered. When a bomb threat is called in, the rational purpose of it is to allow us to find the bomb. The rational object of terrorism is to promote terror. There's a model behavioral pattern for every (..)1998 The X Files