Empirical truth is truth that is arrived at through my personal experience or someone else's experience. Empirical truth is acquired through the senses. Therefore we cannot say for sure that something is true unless we or another human has experienced that truth. If we can imagine the opposite of the truth then we say that truth is contingent. For ex I know that my house is blue. I painted it last summer and I stand in my yard and look at my house and it is blue. But, I can imagine what it would look like if it were red. Therefore the fact that my house is blue is a contingent truth.