@daniela1 Thanks for your comment! (And you’re right that I would have missed it if you didn’t post here too).
One of my insights is that “#insight note title’s should make strong claims”, which is why I use the strong “should” formulation for most of my insights.
My idea is that if I have to make a strong claim in each insight then it 1) forces me to think more about the clarity of the wording, 2) makes it easier for other people to challenge the claim, and 3) makes it easier for me to notice two contradictory claims. The big downside is that it can over-represent my confidence in the claim/insight.
I’m quite confident that “Links should connect non-sibling notes”, but I’m much less confident in the corollary that “Siblings should not be connected by links”, for some of the reasons that you suggest in your comment. My plan is to see how I feel about that as my note collection continues to grow, but I can myself revisiting this insight.