Gertrude, the Politician, knows how to equivocate. She can say stuff that certain ears wishing to hear one thing or another can hear either one thing or another. She doubts it is no other but the main but here, she can say, “Sure, maybe, something like that” without saying, “No, you nimrods. It seems unlikely that this slip of a girl to whom he has written some bad poetry would inspire full on madness. I think he’s pissed that he’s been dethroned. I think he’s pissed that I married his uncle. I think he’s mourning his father. Anything over that is some mad gravy.”
It is very curious how Claudius is so interested in getting to the bottom of what’s going on with Hamlet, when it’s so clear to his mother.