Does 2+2=4? (This is not a math question)

But Bogin added courses like antimanipulation, which was intended to give children tools to decipher commercial or political messages. He taught a required class called myshleniye, which means “thinking,” as in critical thinking. It was based in part on the work of a dissident Soviet educational philosopher named Georgy Shchedrovitsky, who argued that there were three ways of thinking: abstract, verbal and representational. To comprehend the meaning of something, you had to use all three.
When I asked Bogin to explain Shchedrovitsky, he asked a question. “Does 2 + 2 = 4? No! Because two cats plus two sausages is what? Two cats. Two drops of water plus two drops of water? One drop of water.”

This is an excerpt from a thought-provoking New York Times article, My Family's Experiment in Extreme Schooling, by Clifford J. Levy.