Plot hole: Spoiler. Agent M points out as highly suspicious that the twin assassins knew the location of Vungus, and High T backs her up on this, saying that only a handful of MIB officers could have leaked that information. High T also established that those aliens were part of the Hive collective. It turned out that they were not part of the Hive, and the Hive connection was made-up entirely by the villain himself...which is the Hive! What he did was absurdly counterproductive to his cause: nothing except the report he himself made up connected the Hive at all with the case.
Suggested correction: Maybe a wrong move by High T but more like a character mistake rather than a movie mistake. High T was trying to scare the agents into overreacting to what was perceived as a high risk threat. Then it backfired on him but definitively non a plot hole.
I don't mind the proposed changes of category, or even a 'demotion' to Stupidity. But I say it's more of a Plot Hole by the definition used in the website; " Events or character decisions which only exist to benefit the plot, rather than making sense." The whole plot moves along thanks to a deliberate decision by the villain who literally fabricates evidence to implicate himself.
Sorry but it COULD make sense. We have 2 aliens from planet X (which is presumed to be a "hive" territory) that - at that point in the movie - are perceived as killers. It makes a lot of sense for HighT to reinforce in Agent H and Agent M the fear of an incoming invasion by waving the Hive scare flag in front of them. HighT could not have predicted at that point in time that the twins would say "we need that weapon for the hive" before being obliterated, Thus starting a doubt in H and M.
I fail to see why it makes sense for him to tip them off about the much larger intergalactic invasion when he just needs to send them on a wild goose chase to buy himself time for the last part of the plan. He amply demonstrates that he can fake anything about their background. Or simply not fake anything at all;they have no Hive contamination, and so they are just refugees from a dead planet. Instead, he fakes evidence that implicates his faction and is caught hiding that forgery.
Maybe Stupidity is more appropriate.
Plot hole: Molly disturbs some birds at the hologram causing them to fly off. First off, the birds don't react realistically at all in how or where they fly to. Then secondly the birds fly directly at the fence part of the hologram and go through it. This is a visible construct to the eyes as a fence, and thus the birds would see this as an object in their way as well. Even if the birds saw what was there before and saw the hologram appear, they would not posses the knowledge or intelligence to know it was something they could just fly through and would go over it. (00:10:38)
Plot hole: Spoiler: It appears entirely impossible that the Hive plan (which apparently involved just...waiting around indefinitely for a specific weapon to turn out, if you listen to H's summarization of it, which T agrees upon) could ever work, in particular for years as depicted: H 's mental conditioning literally does not go past one sentence he memorized, and breaks down if asked for any detail. He could never have filled a mission report or be engaged in conversation about the subject. And High T has Hive DNA: we have to believe that MIB does not conduct as much as an annual physical on its members - and that considered that other high officials were suspicious of him to begin with. (01:36:00)
Plot hole: When young M has the alien in her room, why don't the agents remove the alien from her room before erasing her parents' memory? If M didn't get rid of the alien out the window, they would just have to come back. (00:01:00 - 00:04:00)
