That's what a community is: taking for granted certain assumptions, not having to start from zero every time. This is no longer true.
The photograph is like a quotation, or a maxim or proverb. Each of us mentally stocks hundreds of photographs, subject to instant recall.
Thinking, writing are ultimately questions of stamina.
To paraphrase several sages: Nobody can think and hit someone at the same time.
An important job of the critic is to savage what is mediocre or meretricious.
Any disease that is treated as a mystery and acutely enough feared will be felt to be morally, if not literally, contagious.