As I understand it...

Your "proposition" was, quite simply...

In order to know what fact is -
one must know what the properties are
that define fact

And, I still maintain that...
The "properties" of "fact"...
Are clearly defined...
And, readily accessible...
-- In the Dictionary.

Since you have yet to prove me wrong...
Then...
According to your own "logic"...
-- I must be correct.

BTW...
An object is not a fact.
But, rather...
-- Facts define objects.

Thank you for playing.

-PRev1-

President Barrack Hussein Obama

-- Nobel Peace Prize, 2009 --
"War is peace. Freedom is slavery. Ignorance is strength."
-- George Orwell, "1984" --

"If you suddenly think Stephen Colbert is truly right wing, that's when I would worry."
-- Neuropsychologist Katherine Rankin.