Why does Hamlet still associate with Rosencrantz and Guildenstern??

Hamlet's amazing discernment means he can see the ulterior motives which brought Rosencrantz and Guildenstern to Elsinore- that they are spying on him for the king and queen. And yet, even after telling them he knows that they are partaking in the skulduggery, they move on to another topic, without any seeming animosity! They talk in depth about the "war of the theatres" and the players that are coming to town. Later, besides, he associates with them. I am confused. Why doesn't he reject his university friends entirely? Does he think them utter fools? That they are so dim-witted that he believes himself safe from their gleaning any information to present to Claudius? eh. i dunno. :banana: no particular reason for the banana. It just cracks me up.

Since the appearance of the ghost, Hamlet sees duplicity all around him - except for Horatio. With Claudius, Gertrude, Ophelia and Polonius all black, R & G are a mere shade of grey.