The definition i got of this was 'noun: (psychiatry) a defense mechanism that uses reasoning to block out emotional stress and conflict'. Not sure if that's what you were after, or whether you were intending on using it as the change to intellectualism. But seeing as it's that, i'll use that.
Defense Mechanic
Blocks out emotion and stress
Seems irrational
Continuing this new intellectual way of doing things, I'll go with,
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