What specifically is unclear?

Wikipedia said they would enable users at to be able to quickly tell what the confidence was in the facts being presented and to my knowledge never did. My understanding is that even now that linked sources are not even systematically checked to confirm they even relate to the related passage of text.

the -> they

That was probably readable by context for most, yet not for me ;)

My bad, thanks for the clarification, even in rereading sentence, didn’t notice the error.