I agree that there are truths which vary depending on the variables, and the answer depends on those variables, simple algebra, but when can solve for those variables leading to an answer, a truth.  

In quantum physics we see this when measuring subatomic particles, when observed they act differently then when not observed.  Light also acts strangely, at times acting as a wave and at times as a particle.  We understand this and they are truths we are aware of.  This does not change that 2+2 will never be five.  Ambiguity is when we are uncertain of the truth, such as a math problem we can't solve, or variables we aren't certain about, but in the end, the ambiguity comes from ignorance, in other words sin.  There is an answer to the problem when all variables are accounted for, this answer is truth.