"Is it possible for me to meet Karsus, ruler of Netheril, in the flesh this week?"
THing is, this could be answered either yes or no, equally validly. The spell description explicitly says that it doesn't account for possible spells or other influences that could alter the answer over time. So the answer could be "yes" in a purely hypothetical sense, but the most likely answer is "no" even if Karsus is actually still alive, because the spell won't predict whether a specific combination of spell effects could make it happen.
This is more or less what I meant with the thing above. Anything open enough to definitely not get a dead-end answer will have the risk of a vague answer that doesn't tell you enough. Anything pointed enough to guarantee no vague/incomplete answers runs the risk of being evaded with excess specificity. And if you cast the spell more than once in a single day, you risk just not getting answers at all.
I even checked other similar spells.
Legend lore doesn't help, because it only delivers past information, and thus you can only learn whether Karsus is still around if the GM
wants you to know that he is.
And that's kind of the rub here. These are powerful information tools, but they are very, very difficult to use to learn things the GM doesn't want you to know about the past, and can't guarantee knowledge about the future. Not even accounting for the explicit instruction to the GM that the spell can generate an indecipherable riddle or highly metaphorical answer!
For example, what if you got this as your answer to your stated question:
"Your quest to seek the wizard-fool
Who shaped a crown as wicked tool
Will show you all how mages fall
His fated thread must still unspool."
This could mean
almost anything. Maybe you'll meet Karthus and deal with the final legacy of Netheril. Maybe you'll free him from his curse. Maybe
he's dead, but his "fate" remains unresolved, and the players have to deal with the lingering consequences that still remain. Maybe Karsus has unknowing descendants, and now they are being pulled forward by the "fated thread" that "must still unspool". Perhaps a god has some kind of plan for the idiot, and the party will get wrapped up in it.
Or maybe Karsus is alive and well, but you aren't going to meet him for more than a week, and the answer is simply a flat "no", despite that
seeming like it means Karsus is just gone.