[pmeunier]

It's indeed not possible to make merge mistakes in Pijul, in the sense that the order between lines is always preserved: if line A comes before B in one repository, A will be before B in all repositories that have these two lines.

Moreover, merge is associative, which is the intuitive idea of a "good merge", in the sense that merging your patches one by one is the same as merging them all at once (this is false in Git).

In Pijul you can't "make mistakes rebasing". A repository is a set of patches (set as in maths), you can add patches or remove patches from the set, and that's about it. Two repositories with the same set of patches (possibly applied in different orders) are totally equivalent (in particular they have the same file contents).

So, rebasing in this case would be just the operation of adding some patches and removing others, and hence you can't make mistakes doing that, because there is no manual merge operation needed (of course you still need to solve your conflicts).