It is not critical but I think it is interesting.

For example, I've read Code Complete 2, and while browsing online I found that some of the claims in the book was not solid.

- https://www.sicpers.info/2012/09/an-apology-to-readers-of-te...

- https://www.lesswrong.com/posts/4ACmfJkXQxkYacdLt/diseased-d...

The point made in the above links are interesting but, because I remember reading this particular book, they are sticking more deeply in me.

Also it probably depends heavily on the topic.

For example in economic or philosophy, there are different schools of thoughts and I think it is valuable to know from which school a "fact" is attached to. And before learning about every school, it is probably easier to just remember where you first read it.

This is not critical, but maybe having this information can help you create new insights.