A rationalist, by definition, is logical. And if he--not his friend, not his mother, not his pastor--sees a ghost, he will acknowledge as such. That's why Horatio freely admitted upon seeing the evidence. So I'm not sure what "blind rationalist" means.
Revenge, ambition, lust and conspiracy return to the heads of those that conjured them in Hamlet, completely annihilating two families--the innocent with the guilty. Check out my blog on the play (includes current link to PBS Great Performance video of production of play):