It operates in many ways. One way is looking at outcomes. For instance, compare abstinence-only to more comprehensive sex-ed and look at what happens to teen pregnancy rates. Reality would favor the liberal policy.
Conservative policy does not care about outcomes, it just cares about preserving the hierarchy, which is why conservatives have to work overtime to discount academics.
They exist, but the problem is reality has a liberal bias and academics tend to follow the evidence.
what is liberal bias
It operates in many ways. One way is looking at outcomes. For instance, compare abstinence-only to more comprehensive sex-ed and look at what happens to teen pregnancy rates. Reality would favor the liberal policy.
Conservative policy does not care about outcomes, it just cares about preserving the hierarchy, which is why conservatives have to work overtime to discount academics.