This just came up in the last game-session.
Can a character with the detect lie blood ability detect wether a person
with the unreadable thoughts is lying ?

The Unreadable Thoughts entry mentions that the characters thoughts,
feelings and plans can not be discerned by ESP. Empathy, Telepathy, or
other spells and effects. This would seem to indicate that detect lie
doesn't work in this case.
The other player argued that detect lie works on the cognizance of not
telling the truth, which according to him is not a thought, plan or
emotion. Furthermore the detect lie ability worked by picking up the
physical indications that betray the telling of a lie (A kind of remote
ploygraph test).

I am of two minds at the moment so any input would be appreciated.

Jan Arnoldus