What evidence is there that both the "Point" and "Counterpoint" writers believe that social media is a permanent part of American society?

Hello. You did not inform the article to which this question refers, which makes it impossible for it to be answered accurately. However, I will try to help you in the best possible way.

As shown in the question above, the authors agree that social media are permanent elements in American society, that is, it is not possible to exclude them from society. However, if there is a "point" and a "counterpoint" it means that the authors disagree whether this permanence of social media is beneficial or not for society. Thus, the authors must formulate arguments that address their opinions, however they must present evidence that justifies the arguments formed. The evidences are statements that prove that the argument is true and correct. In this case, to answer your question you must find in the article which are the statements that prove that social networks are beneficial and the statements that prove that they are harmful, in the arguments of each author.