I am a programmer by trade, so I am more adept at logic than mathematics. One thing that has always perplexed me about the Michelson-Morley experiment was how it is used to reach the conclusion that there is no ether. Just given basic logic, there is a third alternative that I have never seen discussed or explored (in this website or historically). I present it here not as proponent, but to ask if anyone else has heard or read anything about a third alternative interpretation of the Michelson-Morley experiment - a multi-ether universe. Below is the analysis that lead me to consider it as a possibility (a small possibility, but a possibility nonetheless). I hope this is the right forum for this. The Michelson-Morley experiment tested the following hypothesis: Light travels through a medium The experimental prediction given the hypothsis was: If light travels through a medium, the speed of light should vary as the Earth orbits the sun. Of course, as history relates and countless experiments confirmed, there is no difference in the speed of light as Earth travels around the sun. The following conclusions were reached: 1. Light does not travel through a medium. 2. There is no medium. The logic seems inescapable. However, the jump from conclusion 2 from conclusion 1 is not rigorous. To see why, let's take a simple example. We present Neo with a box (sorry for the Matrix reference but I could not resist). We tell Neo that in the box we may or may not have placed some keys. We ask Neo to state his hypothesis about the number of keys in the box and being just human he cannot see into the box. Neo's first hypothesis is: There is a single key in the box. We tell him that he is wrong and ask him to state his next hypothesis. He says that: There must not be any keys in the box. We tell him again that he is wrong on two counts. The hypothesis is wrong, and there is a third alternative he has not considered. He scratches his head for a long while, then finally says: There must be more than one key in the box. We congratulate him on his correct answer and send him off to find other truths about reality. Applying this simple thought experiment to the original set of conclusions above, we get instead: 1. Light does not travel through a single medium. 2. There is either no medium or more than one medium. Prima facie, this third alternative, a multi-medium universe, seems absurd and is probably the reason it was never considered and will never be considered. However, when I consider it seriously (for fun), it leads down some interesting, albeit crazy pathways. For example, it would mean each observer has a medium that is attached to him, conveniently travels with him, is as big as the visible universe, and overlaps all other observer mediums. There are a number of other outlandish possibilities I have thought of, but this is probably not the forum to air them (and be labeled a pyscho). Despite the craziness, I am curious if: 1. the logic leading to the modified conclusions appears sound 2. anyone else has ever heard of, thought of, or explored this third possibility 3. the third possibility has ever been experimentally tested 4. the third possibility could even be experimentally tested I hope this does not come off as sophistry and would appreciate any thoughts.