so in this sense no omniscience and omnipotence is needed..
one must just study God to be familiar with him, to 'know' him is to have ones own experiences confirm what is learned of him.
So list some examples of expriences that confirm that God is omniscient, omnipotent, omnibenevolent, that God is the Source of All, the Summum Bonum, and that He loves us all.
so a person can claim to 'know' God and still be fallible..there is no omniscience and omnipotence needed/required,
also with this 'know' there is no 'one correct' religion..
It's also an apparently trivial solution, as it allows people to believe that pretty much anything people claim about God is true.