YOU ARE NOT PETER ! GET OUT OF MY HOUSE
Did not accept "You are not Péter". Both should be accepted.
Isnt this supposed to be: He is not Peter?
ő = he/she/it
ön = you (singular, formal, the verb is conjugated as third person singular)
When should I use "Ön" and when "te"?
When talking to your boss (for example) you use 'Ön' but for a friend use 'te'
It is very hard to hear the difference between Ő nem Péter and Ön nem Péter
Just one facet of any language spoken at normal speed you have to get used to, I suppose. At least Hungarian is one of the more discrete languages unlike, say, French, with its liaisons and numerous homophones.
It accepted én for me a moment ago even though that is clearly wrong.