@Fil Albuquerque,
I could go on either about the phrasing:
"I do not know the nature of reality"
Which implies:
First of all you assume the existence of such a state of affairs as "I", and "not knowing", per se things, bed rock for the claim to make sense.
or:
"whatever it is it is"
Again, you assume a reality, you must. Otherwise you couldn't even make any question about whatever...
Thus you must conclude that you have objective knowledge at least about some things in reality like, not knowing what is the true nature of reality...
Don't you worry the contradiction is not yours...Socrates had the same epiphany long ago...and no one solved yet...so this is not a critic to "you" Frank...just making you think about what it implies.