Below you can find the Some believe they're meaningless by-products of rem sleep; some that they have hidden meanings Jeopardy Words Answer. The answer to Some believe they're meaningless by-products of rem sleep; some that they have hidden meanings has 6 letters. This clue belongs to the Psych 102 category and is part of Jeopardy Word Level 1855. If you scroll near the bottom you will find other clues and answers part of level 1855