Is that what I said?
Well, you referred to an “imaginary” ice dam, and these are a well established feature of the late ice age.
It’s interesting that when Harlan Bretz advocated formation of the scablands by a catastrophic flood, his arguments were not accepted. Largely, one might presume, because they smacked of diluvialism, but ostensibly because no one could “imagine” how such a flood might have occurred.
It was many years later that independent lines of investigation led to evidence for the draining of a large glacial lake, and this reveresed the tide for Bretz’s reputation, fortunately still in his lifetime, but unfortunately very late in his career.
Explain what you said.