Final answer:
Irreducible complexity and intelligent design theory claim that certain molecular structures are too complex to have evolved gradually and must have been designed by an intelligent being. However, this argument is not supported by scientific evidence and is refuted by the theory of evolution through natural selection.
Step-by-step explanation:
The question addresses the concept of irreducible complexity and intelligent design theory. Irreducible complexity argues that certain molecular structures are too complex to have evolved gradually and must be the result of intelligent design. However, this argument is not supported by scientific evidence and is often refuted by the theory of evolution through natural selection. The complexity of the universe does not necessarily imply the existence of a powerful and intelligent designer, as natural forces and evolutionary processes can lead to complex adaptations over time.