User blog comment:Brianbreed/The Biggest Single Plot Hole in Mass Effect 2/@comment-1221773-20110910031721/@comment-4004783-20110911151524

I'm replaying the game right now and after acquiring Mordin and meeting him on the ship, Shepard says, "We collected some samples from one of the colonies. I'd like you to analyze them." Or something along those lines. It doesn't need to be explicitly stated that they have caught a seeker for Mordin to analyze. Since he is supposed to develop a countermeasure against the seekers, it is safe to assume what Shepard is talking about.

Same goes for the ending. We don't need the game to spell out every little detail. We know enough to piece things together. In my mind, things happened smilarly to how Commdor described. I don't see any plot holes.