"Anyway, 200 proof Everclear is already dehydrated Alcohol."
"This does not exist. The 190 proof version is the best that exists, and you can't even purchase it in California. You have to go with the low octane stuff."
Actually 200 proof ethyl alcohol does exist and can be purchased, if you are a chemistry lab and have the appropriate license (even in California). It is 100% ethyl alcohol.
190 proof ethyl alcohol can be either 95% ethyl alcohol with 5% water or "denatured" which means it's 95% ethyl alcohol as well as a total of 5% of water, methanol, and other hydrocarbons. Denatured alcohol is poisonous so you shouldn't drink it. It's for stoves, paint stripping, etc.
If you want 100% ethyl alcohol, make friends with a chemist or chemistry grad student.