N-COUNT
過時的觀點;陳舊的原則;錯誤的信念
If you describe an idea or belief as a shibboleth, you mean that it is thought important by a group of people but may be old-fashioned or wrong.
例句
It is time to go beyond the shibboleth that conventional forces cannot deter.
是時候擺脫那些傳統力量無法遏制的陳規陋習了。