i don't know

is it plain stupidity or sheer perseverance if you keep knocking into brick walls but refuse to give up?

stu·pid·i·ty 
–noun
the state, quality, or fact of being stupid

per·se·ver·ance 
–noun
steady persistence in a course of action, a purpose, a state, etc.,
esp. in spite of difficulties, obstacles, or discouragement.

Source: Myself; Dictionary.com UnabridgedBased on the Random House Dictionary, © Random House, Inc. 2010.