proved (adj.)
- actual
 - ascertained
 - assured
 - attested
 - authenticated
 - certain
 - certified
 - confirmed
 - corroborated
 - decided
 - demonstrated
 - determinate
 - determined
 - documentary
 - effectual
 - established
 - factual
 - fixed
 - guaranteed
 - historical
 - open-and-shut
 - proven
 - real
 - secure
 - set
 - settled
 - stated
 - substantiated
 - sure-enough
 - tested
 - tried
 - true
 - truthful
 - unquestionable
 - validated
 - veracious
 - verified
 - veritable
 - warranted
 
What makes all doctrines plain and clear?
About two hundred pounds a year.
And that which was prov'd true before
Prove false again? Two hundred more.