Apodictic
Adjective
Latin, 17th century
Clearly established or beyond dispute: originally from Greek “apodeiktikos” and “apodeiktos” and Latin “apodicticus”, it stems from the verbal adjective of “apodeiknynai,” meaning “to show off, demonstrate, show by argument, point out, prove.”
Example: My apodictic knowledge of the history of canines is due to my life-long love for dogs.
Chief Writing Wolf 
An unusual word to add to our vocabulary. I shall try to use it.
Yes, it is! And I really do have an apodictic knowledge of the history of canines!
Yes I remember you speaking of this.