Presuppositions and Truth

Today I was listening to "The Briefing" podcast. On it Mohler was discussing presuppositions. People claim that the Christians respect for life comes from a presupposition concerning life in the womb. They claim the Christians view of life is only a presupposition. This is not the case. We may have a presuppositon which respects life, but it is not unfounded. Our presupposition is bible based. We believe the Word of God to be true. Therefore, we make our decisions concerning right and wrong based on that understanding. Everyone has presuppositions. Ours are Scripture based. What about yours?