Ok, a side note on etiquette here.

When I saw this reply it had a point score of 0, which means somebody downvoted the post.

When a user is freely admitting a lack of expertise, and defers to another user who seems to know better, I would say it's extremely rude to downvote that reply.

This is an example of a user going out of their way to humbly rescind their previous statements when it appears they were mistaken (this is admirable and not a thing that usually happens on the Internet). They didn't do it for their own benefit, but for the benefit of the community, to not leave misleading or incorrect information in the comments.

So to sum up, downvoting a selfless act is pretty shitty and not good for the community.