If you'd care to look back at the referenced exchange, you'd clearly find that it was you that was making unsupported assumptions.unjustified assumptions about the unknown.
But enough about you.
Your continued assertion that a lack of knowledge is knowledge of a lack fails on all fronts. With our current technology, our current surge in CO2 and temperature and the MINIMUM amount of time it would take for those value to return to pre-industrial levels will be discernible in the geological record for well over a million years.