Exactly what I was going to point out also. Maybe the OP was throwing in some humor? The only reason I say this is that it seems like all other criteria are als

Exactly what I was going to point out also. Maybe the OP was throwing in some humor? The only reason I say this is that it seems like all other criteria are also not very concrete. For eg, following so and so on twitter, lunch-time discussions - as opposed to having a good understanding of type systems, functional programming etc.