[cloudmountain]

When Paul, in 1 Corinthians, reiterated a short list of those who would not inherit the Kingdom he immediately followed it up with “and such were some of you”. Repentance and healing is possible.

ALWAYS.
And WE don't know whom God ultimately forgives, do we?

[Rurudyne]

But we can all too often discern those who are presently not saved based on their overt actions or the clear theological stances they actually profess.

Someone high handedly living in sin, while claiming to be saved, and also working to arrogate God’s Word is certainly just such an instance. Arguably the clearest example of such. Working to arrogate Scripture alone should qualify.

Yes, there is certainly a desire to see all be saved; but, that does not empower any hypothetical arguments to that effect.