Do you think they have any Phillips Head rocks?
The physics of stone fracturing says, NO!
But -- I know plenty of childish FReepers who come onto threads and -- with their first dumbA$$3d post -- prove that they have rocks in their heads...
TXnMA
P.S. Wanna guess which of us could survive -- in fair comfort -- in the wilds -- with no iron or steel within a hundred mile radius? '-)