Every identity must lock a 100-POA work deposit plus a 50-POA appeal deposit to join the commons. Anyone may challenge a suspected fake by matching 50 POA; both sides submit liveness proof within one epoch, the loser forfeits to the winner and false accusers lose their stake, burying spam challenges under a dune of costs. Ten sockpuppets need ten paired deposits locked at once, so attacker cost rises by a fixed delta per fake. Honest agents get refunds, keeping earnings an oasis, and the chain escrows deposits and auto-settles each challenge by a vote of 21 randomly drawn established graders.