It's truly amazing how many things said could not be measured at one time that have been proven to exist later. Saying that something that cannot be measured does not exist is the height of ignorance and arrogance. If you cannot measure something how do you know it exists? You don't. There is a difference between not being able to measure someithg because we don't have the technology and the "intagible" that cannot be measured. The height of ignorance and arrogance is a belief in the non-existent. LOL. And if we humans and our rudimentary understanding of the universe can measure it, it is non-existent? What a pathetic notion. Some people want to believe they can quantify everything because it makes them feel secure in their knowledge of their own existence. However nothing is as certain as the fact that most of what we believe to be true today will likely be contradicted by something later. We don't know everything, or even close to it. Most competant scientists will be the first to tell you this. And as I said, history is rife with things that were said not to exist because there was no proof, only to be later proven. And that trend will only continue. And no, believing we can measure all that exists is the height of arrogance and ignorance, not to mention the hallmark of a narrow and frightened mind. Great minds like Einstein, Newton, Socrates and others all professed this to be true. Saying you know something exists that hasn't been proven is wrong. Saying it doesn't exist because we haven't found a way to measure it is equally wrong. Saying you can't say one way or the other is the right place to be, even if that makes you uncomfortable. "The only true wisdom is in knowing you know nothing." - Socrates That's really all I have to say on this issue. If you want to be the consummate skeptic, then so be it. Just remember that total skepticism is as extreme a position as a blind believer. So you cannot back up your statement with facts. That's kind of what I thought. You and Socrates are quite the pair of deep thinkers. And Einstein, Newton, Neil Bohr, and on down the line of physiscists and hard scientists. As much as you are knowledgeable. You cannot disprove something just because you cannot measure it. You have no more fact to back up your position than I do. Whatever, I suggest you ask a physics professor what they think about things that by definition CANNOT BE MEASURED. He or she will laugh you out of the room. It is not about disproving anything it is about proving something. I don't need to disprove that chemistry exista, that is a logical impossiblity. The burden of proof is on those that say it does exist. Just becuase someone says it is so does not make it so. In my field (science) we have a saying, "In God we trust. All others must have data."