It's difficult to have a good ear for BS if you don't come from an environment where reliable institutions have the most influence. Today an educated person believes a lot of facts that are but bullshit in day-to-day experience: that the sun and earth are orbs in a vacuum held by gravity, that quantum phenomena exists, etc..

These are things that are difficult to verify but that we take by faith from reliable institutions (the more inquisitive and those with the privilege to be able to do so would have independently verified a couple of these claims and taken the rest on faith). And there are also many seemingly reliable institutions that mix up falsehoods and unsubstantiated claims among the more readily verifiable.