Lies, or bullshit? I mean, a guessing game like "how many marbles" is a context that allows for easy lying, but "I wasn't even in town on the night of the murde

Lies, or bullshit? I mean, a guessing game like "how many marbles" is a context that allows for easy lying, but "I wasn't even in town on the night of the murder" is harder work. It sounds like you're refering to some study of the marbles variety, and not a test of smooth-talking, the LLM forte.