I was watching 4.10 of Suits; the episode that Louis finds out about Mike, bc Mike keeps asking about the key from being in the Order of the Coif. But in an older ep, there was a Harvard-off where Mike was against other associates, answering trivia about Harvard. He got all the factual trivia right. He knows the facts well, and since he lied about the degree he got, he would have researched well enough to find out about the key, and remember it, imo. It just seemed like a hasty, lazy plot hole.
YES, ohmygosh! I agree with you 110%. I feel like the past couple seasons the Suits writers have gotten either lazier or more careless, as all of the plot of season 5 so far has been jumpy and nonsensical. There are so many plot holes, too! If you haven’t seen the season 5 mid season finale yet, I don’t wait to spoil anything for you, but there were three gaping plot holes in just one episode. And yeah, in 4x10, I seriously doubt one question about a stupid key could have led so easily to Louis figuring it out and turning so irrational. I feel like the writers were just like, hmm, we’ve got to somehow get Louis to figure out Mike is a fraud because we’re running out of ideas, so they sat together and brainstormed and were like: what if we had something small but obvious about Harvard that only someone who really went there would know! And thus the key was born. But seriously, how could Mike, eidetic memory and all, not have come across that in his research? If you google “Harvard key,” “Harvard key order of the coif” is literally the third thing that pops up. I totally agree, the writers are just getting lazy.