I know what I know
Many do not believe that I know
They trust, I know...
What I actually do not know.

I believe.....
    I know me too well
    I suppose I should be knowing
    I am a specialist of high caliber
    Hence I know what I should be knowing

Many believe....
    They know me too well!!
    I should be knowing...
    Nay, feigning innocence / ignorance
   How come, I may not know??