a rule for action or behavior, especially obtained from moral thought (Cambridge)
a rule about how to behave or what to think (Oxford)
بیوقوف ,احمق
This policy goes against common precepts of decency .(Cambridge).
moral precepts.(Oxford)
common precepts of decency
moral precepts
Doctrine
Dogma
Principle
Ambiguity
Unbelief
Preceptor
Preception