The title of this bit here refers to an 11th-Century work of Islamic theology, explained here: https://existentialcomics.com/comic/126

The rundown is that a pseudointellectual retreat from rationalism invited its well-deserved ridicule too late, and may have been responsible for the needless and terrible demise of a great world civilization's halcyon era, for which the whole world suffers to this day. We need to learn from that.