His brother was diagnosed with schizophrenia a long time ago.

He has psychopathy, making it difficult for him to understand social rules.

He is known as an expert in psychoanalysis.

My brother works as a psychiatrist.

We should always remember the power of Kannon in difficult times.

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.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.