It's more like: "Is your homepage google.com? Flip a coin, if it's heads tell me the truth, otherwise flip another coin and answer yes if it's heads or no if it

It's more like: "Is your homepage google.com? Flip a coin, if it's heads tell me the truth, otherwise flip another coin and answer yes if it's heads or no if it's tails." (A bit simplified, but that's the general idea behind differential privacy.)