if torture works, ie, it extracts necessary secrets, then
the Al Qaieda leaders we have tortured revealed the Al Qaeda secrets
since they knew the location and techniques of Osama Bin Laden
they told us this information, so we know Osamas methods and locations
—
since we haven’t captured Osama,
we didn’t have the leaders, or
torturing them didn’t extract secrets, or
we have Osama, or
torture does not reveal enemy action/intention.