"I seem to remember that the park adjacent to my school was humongous."
This is a sentence of a native speaker when he was talking about how things have changed compared to when he was young.
The expression "I seem to remember ..." sounds different to me. And I wondered why he said "I seem to remember..." rather than "I remember....". And I concluded he used it to mean he can remember a little of those days", otherwise he would have said "I remember....".
So, if my conclusion is correct, is it idiomatic to say "I seem to remember ........"? If yes, can I use it for other verbs, for instance "I seem to forget ....." rather than "I forgot ..."?