I believe you, but intent unfortunately doesn't communicate itself well in internet forums, so the burden is on the commenter to disambiguate.

https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

In this case the phrase was one that commonly communicates dismissiveness, which is why I interpreted you the way I did. If you read the guidelines it's clear that (to take your example) such a reply can be shortened to "Oranges do not have a blue inside".

However: no harm done! I appreciate your reply and your intention.