wires and the concept of breathing

Memory. Facts.
Memory can be altered and facts are truth. But facts are also altered. Information always changes.
What we learn in chemistry isn't the same as it was 20 years ago, not everything. Also, what we put down as facts is also put into our memory, and if memory can be altered, than therefore so can facts.
So whats true than?
How can we base truth on facts?
Im not saying facts or memory is wrong, ( because both are equaly capable of being right and wrong) but to say memory can be altered, than your also saying facts can be to.
Both can be right and both can be wrong.Than again, if facts are wrong, than there not facts, just false information.