Impenetrable falsehood

From Ardrana

The impenetrable falsehood spell makes any untruth spoken by the caster or a touched spell recipient sound convincing and hides all untruths from a detect lie spell, similar magics and related spell-like abilities. It also foils ESP and other mind-reading magics or psionic abilities that could reveal a lie. True thoughts are hidden behind random ruminations on two or three topics mentally chosen by the caster as the spell is cast.

This spell originally appeared in this form in Faiths and Avatars for the AD&D game from TSR. Its use here is for the purposes of providing context for the campaign only.