This document discusses the debate between evolution and intelligent design. It provides background on William Paley's watchmaker argument and examines Michael Behe's claims of irreducible complexity. The document outlines Behe's view that certain biological structures could not have evolved step-by-step and must have been designed. Critics argue that Behe overstates his case and that structures he claims are irreducibly complex can in fact be reduced or have alternative evolutionary explanations provided. The debate examines whether intelligent design constitutes science or is a religious argument. Overall the document explores both sides of the intelligent design vs. evolution debate through examining key figures like Paley and Behe.