Read the excerpt from "politics and the english language" by george orwell.

but if thought corrupts language, language can also corrupt thought. a bad usage can spread by tradition and imitation, even among people who should and do know better. the debased language that i have been discussing is in some ways very convenient. phrases like a not unjustifiable assumption, leaves much to be desired, would serve no good purpose, a consideration which we should do well to bear in mind, are a continuous temptation, a packet of aspirins always at one’s elbow.

which type of evidence is used in this excerpt?

statistics
quotations
examples
hypotheticals