Ann: Outstanding Aircore Intercepts Confirm Cu-Ag Discovery, page-9

it's not a discovery at all to start with.

they had these historic results from few holes and could not test the area due to access issues.

while there is no guarantee there will be a discovery (economic deposit) the signs are good so far.

also, you are making good point though, but you should also understand many old "discoveries" and real old discoveries when tested with modern technics lead to great new discoveries.
Check Cowal as an example. See how much more EVN added after Barrick sold it as no future mine due to Barrick not being able to find more ounces to extend the LOM significantly.