sich irren - to be wrong; to be mistaken
irrend - being wrong; being mistaken geirrt - been wrong; mistaken du irrst - you are mistaken er/sie irrt - he/she is mistaken er/sie irrte - he/she was mistaken wir irrten - we were mistaken in der irrigen Annahme, dass ... - in the mistaken belief that ... Ich kann mich natürlich auch irren. - Of course, I may be wrong.