true
To answer this we need to know who "he" is in your question.
Critic is a noun.
the adjective for critic is critical
This is not a question. Elaine Showwalter is an American literary critic, feminist, and writer on cultural and social issues. She is one of the founders of feminist literary criticism in United States academia, developing the concept and practice of gynocritics.
Such a person might be described as a critic. Depending upon the validity of the criticisms in question, other terms might also be used. A person who makes unnecessary or unkind criticisms would be described as unpleasant (or other terms that would be impolite for me to mention).
false
false
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Roland Barthes' total output was very considerable, and without further information from you your question cannot be answered.
Judgment
What is the artist trying to communicate to the viewer. <- That's the question that an art critic should ask.
can this production be recommended to viewers
false, you shouldn't because not everything is true.
I think you mean John Ruskin, an English author, critic, and social critic. You can find a lot of information about him online, just type his name correctly.
How my balls ended up in my coffee.
A critic is a person who knows about the subject in question and gives their opinion on it