Hrm... good question. I think back when Ariel and Liam were echoing their first echos things were fudged a little bit, but we had a different mod team then. (obviously)

Can I go with:

The knowledge that the oath was taken by kinslayers, with a vague icky AHH BAD NO reaction to the oath/kinslayers, (but does not specifically know that Arnold was one of them)?