Consider 1, reading minds. If there was any tech that was any better than lie detection ... a scanning type system that was even good enough to hint at a rough notion of non conforming ideas [b] within minds -it would have been used and within the present government agencies and government, there would have been large changes in the power structure - more than anything reported so far.
By 2, remove memories - I have assumed specific / particular things, otherwise broadly, brain trauma and some drugs will do that.
[a] - rise of flat earth beliefs ... magnetism can be disrupted / dissolved with water ...
[b] and not intent by asking the right questions while under observation
What are your thoughts, have you consulted some AIs.. yet? what did they say?
Did you ask Ais, what did they say?
https://www.researchgate.net/figure/The-Audio-Spotlight-deve...
https://patents.google.com/patent/US7391872B2/en
https://www.hackster.io/news/new-speaker-tech-beams-private-...