[Plugin: Yet Another Related Posts Plugin v3.3.1] Is "relatedness" symmetric?

Hi, thanks for the great plugin.

One question about the “relatedness”. Is it symmetric? For example, if post B has 9.5 relatedness score to post A, does it mean that post A also has 9.5 relatedness score to post B? If not, why?

In my blog i have two related posts, say, A and B. While reading A, i can see B in related posts with score 10.1, but in B’s page, no related posts. Cannot understand the reason.

Thanks.

https://www.ads-software.com/extend/plugins/yet-another-related-posts-plugin/