I'd like to address this because this is generally the first argument most theists use in debate. It is a self-contradicting fallacy.
The argument: The universe, life, and all therein is incredibly complex, so it must have a designer.
The rebuttal: If the universe and life is so complex that it must have a designer, then surely the designer must be at least as complex as his design. So by using the same logic, the designer must have a designer, and his designer another one, ad infinitum.
Some then say that the designer however, is the ''uncaused cause'' that must have initiated existence. But to say that a complex being must have a designer and an infinitely more complex one does not, that is the height of irrationality, and you're no longer engaging in a debate. Cause really, what's the point if you can switch rationality on and off, but expect the other to hold true to fair tactics?
The argument: The universe, life, and all therein is incredibly complex, so it must have a designer.
The rebuttal: If the universe and life is so complex that it must have a designer, then surely the designer must be at least as complex as his design. So by using the same logic, the designer must have a designer, and his designer another one, ad infinitum.
Some then say that the designer however, is the ''uncaused cause'' that must have initiated existence. But to say that a complex being must have a designer and an infinitely more complex one does not, that is the height of irrationality, and you're no longer engaging in a debate. Cause really, what's the point if you can switch rationality on and off, but expect the other to hold true to fair tactics?