This question arises from the commentspace in this question on stats.SE.
My comment was:
Last I checked Terry Tao was the pre-eminent mathematician of this generation?
To which another commenter replied:
Which generation is that?
Note that I said "this generation" as opposed to our generation. My question is: does "this generation" associated with a date (timestamp) uniquely identify a generation, particularly in the academic context? How else can I identify a generation -- through reference to a specific person?