Like “does the Pope shit in the woods?” or “that train has sailed?”
Also, what good examples can you think of?
If you haven’t, you might want to read Patrick O’Brien’s Aubrey/Maturin series, or at least to peruse this list from Reddit: https://www.reddit.com/r/AubreyMaturinSeries/comments/4ak12q/which_its_a_prodigious_great_list_of_aubreys/