What do hoaxes often include to add further credibility to their story?

you shopuld find your answers here if you need more. the answer is the infinite variety of human nature

what book are we talking about here

remember, the goal of an adjective clause is to add more information to a noun or a pronoun. as you can see from the examples above, you can add information by including a longer adjective clause or tighten up a sentence by turning the adjective clause into an adjective phrase.