What is absolute truth?

I believe that there is an absolute truth. Here is part of a conversation I had with Liz about the matter:

(6:01:53 PM) spitinacopsface: I don't think universal truth exists
(6:02:43 PM) Sigma386: I do. Otherwise apples wouldn't fall to the ground, airplanes couldn't fly, and fish couldn't breathe underwater. Those are some things I consider absolute truths.
(6:03:19 PM) Sigma386: Well, in their most abstract form, anyway.
(6:04:13 PM) Sigma386: Our explanations of why they do what they do may change over time, but the fact of the matter is they do what they do because of absolute truths.
(6:04:30 PM) Sigma386: And we've written laws to explain those truths.
(6:04:37 PM) spitinacopsface: I don't know.
(6:04:53 PM) Sigma386: Well, I should say "try" to explain those truths.
(6:05:40 PM) Sigma386: And we haven't done too bad of a job trying to explain them, as far as anyone knows.
(6:05:57 PM) Sigma386: Except religious fanatics.
(6:06:41 PM) Sigma386: They do an utterly horrible job of trying to explain those truths.
(6:06:55 PM) Sigma386: And they have been for many years.
(6:08:55 PM) Sigma386: But yeah, I believe in absolute truths, just not in the same way most people do.
(6:09:08 PM) Sigma386: Like I don't believe in a rigid concept of "good" and "evil".
(6:09:48 PM) Sigma386: I don't consider those to be absolute truths at all.
(6:10:06 PM) Sigma386: To me absolute truths are stuff like the laws of Physics, Chemistry, etc. etc.
(6:10:48 PM) Sigma386: Thought the explanations will change from time to time, the rules that have governed those things will always apply.
(6:12:01 PM) Sigma386: That statement, I believe, is an absolute truth.
(6:13:33 PM) spitinacopsface: I guess

That pretty much sums up what my stance on the concept of "absolute truth" is. I believe it exists, and science is as close as we have come to explaining those absolute truths. But they exist in their most abstract form, and they always will apply for as long as the Universe exists. As for a rigid sense of right and wrong, of good and evil, I don't believe in those, because what works for one person may not work for another.