Before revision:  The heuristic allows us to scrutinize the volatility surface and test  theories of relative tail option mispricing and overpricing usually built on thin tailed models and modification of the Black-Scholes formula  .
After revision:  The heuristic allows us to scrutinize the volatility surface and test theories of relative tail option overpricing ( usually built on thin tailed models and modification of the Black-Scholes formula .