In an archival post from the old, defunct LiveJournal, dated 24 October 2003, I quoted an email regarding his ability to lie. My ideas have changed since then, but I am gonna go ahead and give you the old perspective first. The email text in italics, then the body of the post:
He doesn’t seem able to lie directly, but he isn’t inclined to tell me more than he has to, either.
This is typical from what I’ve seen. Now grok this: If you ask, “Is your name John Smith?” he can say yes and it’s somehow not the same as him flat out saying, “My name is John Smith.” I’ve been thinking about the fact that they [spirits] supposedly can’t lie but they can let you believe what you need