He came from a family of Levites.

He was banished from the village as a leper.

My father underwent surgery for kidney stones.

Masato is my best friend.

A tautology refers to a logical formula that is always true, no matter what values are substituted.

The sphericity of this object is very high.

He is the type of person who understands ten from hearing one.

He is exactly in the state of 'A frog in a well does not know the vast ocean.'

He spoke of his big dreams, saying, 'How can a sparrow understand the ambitions of a swan?'

He is researching artificial humans.