Poor reading comprehension said: Sooo, no. Thank you for the extraneous information.
I would agree, you do have poor reading comprehension.
I didn't say that the three brothers have not raced together; that is an assumption you are making.
they may have raced each other at school, or in some domestic fixture in Norway, or in some local meet somewhere else in the world not reported in the main online databases. to be sufficiently certain of yourself to answer "no," to ROJO's question would require access to a far more comprehensive database than I have, or perhaps access to their personal logs, or the brothers themselves. I don't have any of those things, and for that reason chose specifically not to offer a definitive answer.
your complete guess might be right. but then if we all went around guessing these things it wouldn't be "data" any longer, would it.