What's a Heresy?

The Theological Notes: Dogmas, Doctrines and Heresies w/ Michael Lofton
Reason & Theology | 23 Jan. 2024
https://www.youtube.com/watch?v=Mo30L69jy0Q

Nice.
A teaching that contradicts traditional doctrine and is very hard to reconcile, to impossible, even if you turn stones, with dogma, is that a heresy or not?

Because, that's where I definitely place CCC § 283.

Unless of course you care to show a reconciliation between that and Trent Session V, 1546, forget the actual date, canons 1, 2 and 3 is totally possible.

Would be interesting to see you try.

I have even challenged Robert Barron* on that one (you might refer to him as bishop and as ordinary of Winona–Rochester).

He has so far left the response to laymen ...

* See here:
Assorted retorts from yahoo boards and elsewhere : Bishop Barron Against Rad Trads
https://assortedretorts.blogspot.com/2024/01/bishop-barron-against-rad-trads.html