If its just semantics then plainly yes. If its the truth about things, they can in a relative sense; the measure of the truth of something depends on the rules of the argument. 1 + 1 = 3 can be true under certain rules. And under the circumstance that we are not fully aware of the true rules and in its completeness, then it means we can only assume about the truth of something.
A. A famous software engineer, and by famous, I mean all the companies want me. ;p
Q. What is your philosophy in life and computers in general?
"The reasonable man adapts himself to the conditions that surround him... The unreasonable man adapts surrounding conditions to himself... All progress depends on the unreasonable man." - George Bernard Shaw