Hello. You did not underline any claim, which makes it impossible for this question to be answered. However, in the context of the question, we can consider that the claim to which you refer is "Silly words and expressions have often disappeared, not through any evolutionary process but owing to the conscious action of a minority." In that case, I hope the answer below can help you.
Answer:
The author presents two examples of phrases that have lost popularity, as evidenced.
Step-by-step explanation:
Textual evidences are sentences that have the capacity to confirm an author's argument, showing that the argument is real and that it must be taken seriously, because it is correct. These evidences are presented through facts or data that are often not included in the text as real life examples, which prove what the author is talking about. We can see this in the text shown in the question above, where the author proves that many language expressions lose popularity because a minority stopped using it and called it backwards, presenting two examples of phrases that lost popularity because journalists stopped using it.