What is fact to you? How do you know? You test it? What is the test based on? Our senses (touch, taste, smell, hearing, sight)? Logical, Valid Arguments? What would the premises be based on? ... the senses? Where do you get your information? Did you personally test all the things you know to be true? Are you an astronomer, biologist, chemist... etc? How did the scientists come to know? Their senses? Mathematical Equations? Where do you read what their findings are? Books? Internet? You trust other's accounts? Only some people's accounts for things but not other people's accounts? Would you agree that the more we learn the more we don't know? Is it possible that when we (as a people) make an advancement in science and learn NEW facts that they sometimes disprove what was once considered fact? Do we know, with absolute certainty, that our sun will be there tomorrow? Do we trust it will because that is what history and science tell us?
In my experience: Evidence is the favorite buzz word of atheists/anti-theists/agnostics. Unless you test something for yourself you are taking the word of someone else. Possibly multiple experts. However we all know that only because many people will atest that something is true doesn't always make it so (example: cults). If you test something for yourself then you are limited to the facts and logic that are available to you (I think we can all agree that we do not have the full picture) and you are limited to your senses (I think we can agree that our senses can play tricks on us).
SO: do you know anything for certain? Or do you TRUST that things are certain? Can we only say that MOST LIKELY things are true and that is how we come to KNOW something? If you are trusting that things are so, without fully and actually knowing, isn't that then a leap of faith?
Not one person functions without feeling they have some kind of trust... Example: knowing how to get places and expecting them to be there when we show up... However, for all we know a tree could have fallen on a house or a place could be burned down and it is no longer there. We act on the likelihood that it WILL be there. Otherwise we would not go anywhere.
Atheists/Agnostics/Anti-Theists take a leap of faith every day! Interesting to me that some of you consider taking a leap of faith a fault in theists, claiming that they do not think, when we all do the same and take a leap of faith no matter what you believe or lack belief in.