These two feel like common sense until a question adds a condition, a sign, a solid line, a junction, that flips what you'd normally assume.
Here is one worth locking in:
Can you make a U-turn at any junction unless there's a sign forbidding it, or does the default rule work the other way?
U-turns are only allowed where explicitly permitted, usually by a sign or road marking, not by default unless prohibited. A lot of learners get this backwards because it feels like the opposite of how most traffic rules work, where the default is "allowed unless signed otherwise."
Beyond U-turns, this category also covers when reversing is legal on a public road and why reversing around a corner is treated as a higher-risk maneuver.
Your turn. If there is a maneuver rule you keep mixing up, post it here. If you know the answer to someone else's, help them out.