文明的 孔乙己窃书不能算偷
潜意识 不捡白不捡傻子才上缴
人性纯真的一面 不贪婪 不是你的绝不占为己有
inverted thought: do you expect to get back your lost properties if you never want to return when you picked up someone else's?
Law in Australia: It is criminality / offence if you did not try your best effort to return the goods (in particularly money) which are not belong to you.
in China: ?