You can't judge a person's honesty by whether he likes going to the library or not. Going to the library is an act of learning and reading, which does not reflect a person's character or conduct. Therefore, boys who like to go to the library can't be honest, nor can they be assumed to be honest.

The definition of honesty varies from person to person, but it usually refers to honesty, integrity, sincerity and reliability. These qualities are not only related to personal preferences, but also influenced by personal values, family education, social environment and other factors. Therefore, whether a person is honest or not can not be concluded by simple observation or behavior.

In short, boys who like to go to the library are not honest. To judge whether a person is honest or not, we need to have a more comprehensive and in-depth understanding of his behavior and personality characteristics.