I don’t see how one can reasonably refute ECREE. The claim that there are large cockroaches in my garage should not require the same standard of evidence as the claim that there is a unicorn in my garage.
If one decides to abandon reason . . . then maybe debating such a person is a futile exercise to begin with?
Yet sometimes I wonder.
Quantum mechanics shows us how truly strange and bizarre the Universe seems to be on a small scale, and many of the claims made by physicists who study QM are strange, bizarre, and counter-intuitive.
On the surface, claims like a cat in a sealed box that is neither alive nor dead seems about as strange as the claim that a unicorn exists in my garage.
So, I guess that it may be possible that a logician, mathematician, or philosopher may–someday–come up with a valid argument about why ECREE might not apply in all situations.
I’m open-minded . . . but not so open-minded that my brains fall out.