The philosophical argument against intelligent design is unfalsifiable (any evidence could have been created by an omnipotent creator for ineffable reasons), it is unnecessary to account for any of the evidence we have so far, and its proponents are not arguing in good faith.
"Could X be an alien megastructure?" isn't necessarily unfalsifiable, could be an attempt to account for evidence that doesn't fit in current theory, and could be in good faith, but it could also be proposed by people who just believe there are aliens out there in cases where there are obvious explanations and will just move on to a different "but this is definitely aliens" if the first doesn't pan out.
The philosophical argument against intelligent design is unfalsifiable (any evidence could have been created by an omnipotent creator for ineffable reasons), it is unnecessary to account for any of the evidence we have so far, and its proponents are not arguing in good faith.
"Could X be an alien megastructure?" isn't necessarily unfalsifiable, could be an attempt to account for evidence that doesn't fit in current theory, and could be in good faith, but it could also be proposed by people who just believe there are aliens out there in cases where there are obvious explanations and will just move on to a different "but this is definitely aliens" if the first doesn't pan out.