Darwinism is not a testable theory…

I have come to the conclusion that Darwinism is not a testable scientific theory, but a metaphysical research programme.

Karl Popper, from Unended Quest, p. 195, quoted in The Schwarz Report, Volume 48, Number 1

A metaphysical statement of faith…

The evidence for macroevolution seems very tenuous at best: “punctuated equilibrium” that causes such rapid change that no fossil record is left; caused by random mutations, a mechanism that produces such small changes that it is impossible to ever experimentally demonstrate that it produces new characteristics, rather than changes in existing characteristics. These two hypotheses for macroevolution essentially put it beyond the reach of scientific verification or refutation, making it essentially a metaphysical statement of faith that change occurs in some naturalistic way that can at present be neither explained nor observed.

Walter Bradley, quoted in The Trustworthiness of Scripture in Areas Relating to Natural Science, p. 10