There appears to be a wide measure of agreement, both amongst biologists and others, that Darwin's theory of evolution marks a major breakthrough in the science of biology; Darwin has even been called ‘Biology's Newton’, the highest term of praise that could be bestowed on a scientist. A. G. N. Flew, considering the matter from a philosophical point of view, says: ‘Yet one of the most important of all scientific theories is that developed by Darwin in his Origin of Species (...) . Covering the entire range of biological phenomena its scope is enormous. While if any scientific theory is interesting philosophically this one is.’ In spite of the testimony of both biologists and philosophers of science to the importance of the theory, it does not appear to play anything like the same role in biology as does Newton's theory in physics. For modern physics would be. (shrink)

The falsifiability debate has developed largely in response to a challenge offered in the name of this principle by Antony Flew. His basic contention is that since the assertion of any state of affairs is logically equivalent to a denial of its negation, it must always be possible to designate an actual or possible state of affairs which would "count against" or falsify the original assertion. "And," he concludes, "if there is nothing which a putative assertion denies then there is (...) nothing which it asserts either: and so it is not really an assertion." Hence, if the theologian wishes to claim that a typical "theological utterance" such as our suggested paradigm, is a genuine assertion, he must be prepared to stipulate what conceivable occurrence would falsify it. (shrink)