“We’re just not able to extract a salient sense of a knot’s internal structure by looking at it,” Croom said. “It’s a nice case study into how many open questions still remain in our ability to reason about the environment.”
Judging knot strength throws people for a loop: Experiment reveals new blind spot in our physical reasoning
We are clueless about knots!
I have posted knot related items in the past because I love a good knot but this caught me off guard.
In the example above, I would have assumed D was as strong as A but wrong again.