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TropicalRaine t1_jad103o wrote

Ok but eventually you will have an intersection of many filters that cannot occur so often. This can be called a great filter due to both its magnitude and rarity. In order for civilizations to progress we would need to overcome these filters. You can go further with this idea that among these great filters there are even greater filters that occur, until finally you use the time scale of the universe and conclude with a “greatest filter”.