20 For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse, 21 because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened. (Romans 1:20–21, NKJV)
A necessary inference is an inescapable conclusion. For example, it is the means by which God expects us to honor Him as the Creator. The “things that are made” (the material world which we see) testify of unseen things, namely, of God, His eternal power and His divine nature. We necessarily infer from the evidence provided by the material world that there is a God who created all things. We are driven to this conclusion by the evidence we are presented. Life does not come from lifelessness. The presence of life forces us to conclude there is a First Cause of all life; that Creative mind and power is God. Some Christians reject necessary inferences are binding authority. Yet, without necessary inferences we cannot believe God exists and that He created all things. “The heavens declare the glory of God; and the firmament shows His handiwork” (Psa. 19:1). The evidence of a Creator is presented; We drawn the inescapable conclusion (inference) that “God created the heavens and the earth” from that evidence (Gen. 1:1). If you believe God is the Creator, then you have already accepted the binding nature of necessary inferences.