In condensed matter physics, a time crystal is a quantum system of particles whose lowest-energy state is one in which the particles are in repetitive motion. The system cannot lose energy to the environment and come to rest because it is already in its quantum ground state. Because of this, the motion of the particles does not really represent kinetic energy like other motion; it has "motion without energy".
I wouldn't even try to defend OP, but I once heard someone say that if you have more than four apples, then it is also definitely true that you have four apples.
That's true in a very literal sense, but there's a whole branch of linguistics called pragmatics that's concerned with things like why it's usually safe to conclude that when someone says they have four apples, they mean that have only four apples. When there's any ambiguity I talk like a mathematician and use phrases like "at least four apples" or "exactly four apples".
OP treating his statement as a correction requires that he’s not using this interpretation. If he were to use this defense, so could the teacher, so he’d just be changing how he’s wrong, not that he is.
Because if we weren't then no class would ever learn anything, as the teaching would move at a glacial pace and cover material that isn't relevant until you start on your PhD.