Corinnguard
Hero
It really depends on the concept for a given class in D&D. A number of posters on this thread brought up Professor X or Jean Grey as examples of what a Psion, in their minds, is capable of doing. So, from this point onward, that is how everyone is going to see the concept behind the Psion class.Sure. Or not. Depends entirely on your definition of a Wizard and what they're capable of.
For you, it's everything. For me? Not so much.
And definitely not in the same way.
It's the same story for the Wizard. When someone, either within or outside the D&D community mentions the class, what concept of the class pops into your head? Which fictional character automatically makes you think 'Wizard'? Dr. Strange? Gandalf? Dumbledore?
Ditto for the other classes in D&D. Everyone is going to have their own idea for the concept of a particular class in D&D. What we eventually get for a class from WoTC is a concept based on consensus. It's not a perfect consensus (a good example is the Ranger, which people are still not completely satisfied with, but it is a consensus of what we think a Ranger ought to be capable of doing).