That is one explanation

A better one would be that the PFS and the BFS are not prepared according to the same 43-101 rules

I think I learned that the PFS can and did show a value for inferred metals, of which we have a substantial amount

Sine the level of confirmation to classify a resource as measured versus inferred has not been met, we had to classify 171 million tons of pit material as waste and incur a negative cost in the BFS to remove it

In reality, this material will be diamond drilled, and confirmed and moved to the revenue column

This will drastically change all the calculations in the BFS