right, but the thing is how do they know what an expect in [insert domain here] would care about? Obviously by finding content created by people who claim to b

right, but the thing is how do they know what an expect in [insert domain here] would care about? Obviously by finding content created by people who claim to be experts in [domain] people who others claim to be experts in [domain] hopefully valuing membership in group two over membership in group 1.