Thanks for inviting me to the “agnostics’ thread” joshini. I think I’ll reply to your question of evil back on the theists thread because it relates better to theism than the question of agnosticism and what exactly any of us know. But I would be glad to discuss the concepts of ignorance, uncertainty, and belief.
Personally, I like the agnostic position. Socrates would probably agree. When you don’t know, reserving judgment is a wise choice. And when it comes to God, how can you know?
First, off, how can you know anything? You’ve all read Descartes. Cogito, ergo sum. Before that, everything can be doubted. A person can even doubt their own senses. But the very act of thinking creates certainty, and from that certainty there are a number of things you can be sure of:
The existence of intelligence, thought, and self.
From this you can be certain of the existence of any concept which you can think of which must exist (the concept) because you conceived it. Mathematics and logical truth can also be conceived and trusted. But what beyond that can you really be certain of? That’s as far as I am willing to go and still claim 100% certainty. Yes, and that includes the existence of God, but that also includes the existence of you, my physical body, and anything considered part of observable reality.
But I don’t believe it is rational to doubt your own senses in a general sense. Just because you might be a brain in a vat does not mean such a thing is probable. But understanding that at times your senses can fool you because of their inherent limitations can inform your decision-making process.
So, what do you know? What you have perceived and have no rational reason to doubt as well as what you can logically deduce from what you have perceived. This you cannot be 100% absolutely certain of, but the degree of certainty is so high that it might as well be. Thus I will call this knowledge as well.
So, how can you know whether or not there is a God? You must perceive it somehow. There’s no other way, because the question of God is something you cannot trust another person’s perceptions on to claim knowledge of. It’s ok to believe, but not to say you know.