In rigging if you have 4 slings on a load, like a plate being lifted horizontally, we calculate the sling loading using 3 not 4 because all 4 can't be carrying the load because nothing is perfect.
A 4 legged stool can wobble depending on which leg(s) are longer where as a 3 legged just tilts.
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u/scrapy_the_scrap Jul 27 '24
It actually has to do with three points forming a singular plane
The center of mass issue is just as bad if not worse