dumb or wise ???

About Grumio

Grumio is a very old servant who works for Petruccohio, who is a fortune seeker. He is an example of one of Shakespeare famous fools. He plays to be dumb and silly but he is actually emotionally wise. Grumio is very humorous and silly , he plays a role of stupidity but he knows exactly what position of power hes in and how to make the most of it. He always stays loyal to his master Petruccohio, hes referred to as the "ancient, trusty, pleasant servant."
The Taming of the Shrew - Grumio and Curtis