Basically, if no one saw me do it, you can't prove it, hm? Wei Wuxian knows Lan Wangji better than to think he'd outright lie, but there's nothing in the rules about leaving things out, or refusing to answer, is there?

"Hmm, since Wei Wuxian seems to have a faulty memory, why doesn't Lan Zhan tell me what he remembers then?" he persists.