" ella les conece " or " ella los conoce "
To say she knows them, is it. " Ella les conoce " or " Ella los conoce "
2 Answers
Ella los conoce.
Gus has given you the correct answer, however, this is a widely spread mistake, accepted in the language, in Spain. It even has a name: leísmo, which means you use mistakenly the le instead of lo. In this case, if it is a male person or some kind of thing you are referring to, it must be lo.