Well it's not so much that he waited for people to "prove themselves," he just asked questions to alleged experts and tried to show them that they weren't really experts. (i.e. Euthyphro, who believed he knew what "piety" was, even though he was unable to satisfactorily define it.)

 

So the sound of one hand clapping is a dropped valve?

I hate when I come in on these things in the middle....

 

your wheels are pretty hideous.

 

Wow....is that really what this has come to. So sad.