> so you rely on the state to revoke licenses in demonstrated cases of corruption. Revoke how? Does the state, or anyone else besides Bob, have the authority t

> so you rely on the state to revoke licenses in demonstrated cases of corruption. Revoke how? Does the state, or anyone else besides Bob, have the authority to unilaterally modify the blockchain? If so, why don't they just use a central database, since you are forced to trust them anyway?