to suddenly start talking about something unrelated
突然無関係なことを話し始める (totsuzen mukankei na koto o hanashihajimeru)
"He tends to go off on a tangent when discussing politics."
"彼は政治の話をしているときに、しばしば話がそれる。" (Kare wa seiji no hanashi o shite iru toki ni, shibashiba hanashi ga soreru.)
a particular way of thinking or set of ideas
to start doing something with enthusiasm
To start something that creates many new problems.
a set of moral principles guiding AI development or usage
A person who is very interested in politics and has a talent...
to be deeply attracted or infatuated with someone