This seems right to me since e.g. if someone were to use anti-excitement to indicate “this is draining” there’d then be an issue of how someone else might see this and then wonder how best to express they think it’s actually pretty neutral rather than draining (since, while excitement cancels out anti-excitement, indicating excitement itself wouldn’t be truth-tracking in this case).
This seems right to me since e.g. if someone were to use anti-excitement to indicate “this is draining” there’d then be an issue of how someone else might see this and then wonder how best to express they think it’s actually pretty neutral rather than draining (since, while excitement cancels out anti-excitement, indicating excitement itself wouldn’t be truth-tracking in this case).