shibboleth

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Notice that in each case the objection is based on a shibboleth.
值得注意的是每一種這樣的反對其根基不過是一個口號。
Shibboleth is an Open Source project that provides federated identity and access control between academic institutions.
Shibboleth是一個開放源代碼項目，在學員之間提供聯邦制的身份確認和訪問控制。
In the first four weeks after its opening, two years ago, 15 people were hurt while viewing Doris Salcedo's Shibboleth, a giant crack cut into the floor of the hall.
兩年前，在開幕後的頭四個星期內，多麗絲·賽爾薩埵（Doris Salcedo）表縯《口令》時厛裡的地板上裂了個大口子，造成15個觀衆受傷。

This was a sign that Umberto Agnelli and his small, well-regarded staff will abandon at least one shibboleth.
ECONOMIST: The Agnelli investment vehicle
One application, called Shibboleth, is a piece of open source software that enables users to share restricted online resources.
FORBES: Consortium Builds Next-Generation Net
This idea is a shibboleth of sorts, something insiders know as pedestrian fact, something outsiders have serious trouble grokking.
FORBES: Waiting For Lightning: A Deep Peek At A $658 Billion Dollar Market

a belief or custom that is not now considered as important and correct as it was in the past

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.