Reasonablist 

Someone that reasons for a profession and succeeds at everything.

Check that dude out, hes a badass reasonablist.

Reasonablist by Tha Flow Champ May 7, 2010

Reasonablist 

A person who defines all they do with only reasonable actions.

A possible new political party who finds full reasonable justification in any motions, words, or actions that they both condone and justify.
An individual who needs some kind of reasoning to justify their actions or words.

The murder of a murderer, is justifiable to a true reasonablist.

Reasonablist by The voice o'reason 2 infect u! March 4, 2018

reasonablity 

the act of reasoning or having reasonable facts to back up something.

"i get out of things because i had reasonablity."

reasonablity by kentuckydream May 31, 2009