Laissés vs. Laissé

Question

Pour quelle raison c'est « nous les avons laissé faire connaissance » et pas « nous les avons laissés faire connaissance » ? « Laissés » doit être pluriel parce que l'objet direct est avant le verbe, n'est-ce pas?

Accepted Answer

We discussed this topic before, and eventually concluded that the agreement was optional.
https://french.kwiziq.com/questions/view/il-m-a-laisse-tomber

Answer

I don't concur that it's optional, not according to my grammar lessons. Although I did hear there was a going to be a modification made by the Academie Francaise. If that's the case, it should not have been marked wrong.

Answer

I had the same question regarding “Laissés vs. Laissé”… it’s quite a confusing topic