Based is a shortened form of the phrase "Reality Based".
Shortened forms are often acceptable although I do not approve as I feel they make communication unclear and therefore unreliable.
But no one asked me.
34 posted on 07/25/2022 6:47:09 PM PDT by Harmless Teddy Bear
(The nation of france was named after a hedgehog... The hedgehog's name was Kevin... Don't ask)