For markets whose resolution criteria are subjective or contested, take a side on Polymarket and hedge on another venue (Kalshi, a sportsbook, or another prediction market) whose rulebook would resolve the same event differently. If the two oracles disagree, your two positions net to a locked spread instead of a loss. The edge is that the market doesn't price the chance that two resolution sources read the same ambiguous event differently.
Markets on Polymarket where ambiguous-resolution cross-venue hedge is the natural play: