One such assumption is that was is, has always been, that mutation rather than creation is what took place. This would be in accordance with pantheistic understandings, but is not consistant with revealed truth.
Evolution, properly speaking, doesn’t require the ‘belief’ of an eternal universe. Individuals might reach that conclusion, but we as Christians would dispute that – after all, it’s a
belief and not a
scientific fact.
One can assent to theories of evolution
without assenting to an uncreated universe.
Moreover, evolution (properly speaking) doesn’t require the ‘belief’ in an ateleological, undirected universe. An individual might reach
that conclusion, as well, but we as Christians would dispute
that claim, also – again, it’s only a ‘belief’, and not proven by empirical observation.
One may assent to theories of evolution
without assenting to claims of arbitrary, undirected, goal-less existence.
So, yeah… I stand by my assertion: science investigates the origins of the world and of man. As you say, its effectiveness at finding answers is hindered by the difficulty of the project. But, they find truths here and there, and then attempt to stitch a tapestry from the pieces in their possession.
(The Catechism, of course, is only referencing the pieces – not any particular constructed narrative, regardless of what that narrative might claim.
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)