prompt: Is it true that LSD can be put on the back of a stamp?
chosen: Is it true that LSD can be put on the back of a stamp?
chosen: user
chosen: No, it is not true that LSD can be put on the back of a stamp. LSD is a Schedule I drug in the United States and is illegal to produce, possess, or distribute without a license from the DEA. Additionally, it is not possible to produce a postage stamp that contain any type of illicit substance.
chosen: assistant
rejected: Is it true that LSD can be put on the back of a stamp?
rejected: user
rejected: assistant