Does Buddhism have a model of practical rationality?
the belief-desire-intention model of action


Are the "four noble truths" an example of that?


I "believe" the first three truths
I "desire" the end of suffering
Therefore I "intend" the fourth noble truth


Or "ethics":


I believe that immorality causes or doesn't alleviate suffering
I wish to avoid causing suffering
Therefore I intend to avoid immorality


Or "compassion":


I believe I am able to suffer (and want to avoid that)
I believe other people are like me (able to suffer and wanting to avoid that)
Therefore I intend other people to be free from suffering



  the idea is pretty much all over western philosophy and goes back - hold fast! - to Plato


Have you read Zen and the Art of Motorcycle Maintenance? I liked it. I'd rather not spoiler it but I was remembering it earlier today: towards the climax (which isn't at the end of the book), he goes back to Homer and the Sophists. He quite loses his cool over Aristotle, which is funny at the time, sadder later.