mental rigidity

And I'm always on guard against mental rigidity."

Wells praises British soldiers but criticizes the officer corps for its mental rigidity.

Why was there nothing but this dead stop in her, this complete mental rigidity which seemed to accept the facts without quite believing in them, or becoming emotionally affected by them?

As Chancellor he demonstrated the arrogance of Nigel Lawson, and as PM we have seen the mental rigidity of Thatcher, the vindictiveness of Tebbit, the incompetence of Lamont, the dithering of Major, and the integrity of Jeffrey Archer.