Did not make any such assertion.
Nor did my rant for Biblical literacy imply such an assertion.
Of course, if Horton wants to use his definition to cut off Christians, that might count as a denial of the Gospel (though it wouldn’t mean the end of him any more than it did for the Apostle Peter).
But I never said it. Never implied it. And for what it is worth, I testify now that I never thought it or thought of thinking it until I read Hart’s allegation.