What is the purpose of citing textual evidence in a literary analysis essay?

How can you paraphrase this, this is about golden age fallacies.these are all rational people who know that older is not necessarily better, but many are taken in by this fallacy and seem no longer able to reason with any degree of reliability

Today’s readers have more scientific knowledge than readers of previous eras what effect does that have on their reading of science fiction stories

The waves crash on the shore ? alliteration ,assonance,onomatopoeia