Now we have people who don't think the fetus is human. Now we know that standards and rules are often changed in light of new evidence. People thought if you traveled faster than 30 mph, blood would pour from every opening in your body. Now all those established facts have been cast aside by our experience. Actually truth is all five of the above, as long as you realize that all of the above can be misused.
Truth is reality instead of opinion or appearance.
Truth is reliability. You can count on it. The sun will come up tomorrow morning and go down tomorrow night. God of truth. Jesus is the way, the truth, and the life.