Sam Hide's Half Crown

Origin
Sam Hide was a historic tall tale figure in New England, used in the folk saying to lie like Sam Hide. Many historians are unsure if his existence was nothing more than the culmination of individual settler tales. In one story, Hide sold a man the location of a freshly killed deer for a half crown. He described a tree in the local meadow, which had the deer underneath it. The man found the location but no deer nearby. He later met Hide again years later and accused him of trickery. Hide remarked that it was acceptable if an Indian told the truth half the time, so their case was settled.

Effects
Makes a person tell the truth half the time and lie the other half. The listener will usually be unable to tell the truths and lies apart, as they all sound believable and never contradict each other.