On being asked the 2nd riddle question- Which bound does not bite, the answer from the Poem Ballad of the bound appears to be 'Dark Weaver'. This option is not offered by Taliesin. Trying any of the three option causes a curse, so the dialogue is impassable.
Use the scroll bar on the side, to access more responses. I missed the scroll bar first time round
Me too:-) Wasted a stack of food to find out that this riddle can not be solved.