A coworker had never heard of this, and I couldn't provide a real definition. For me, it's always been an instance of 'I-know-it-when-I-see-it'.
Bonus question, who originated the term?
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os 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…