Nasafi on Ikhtilaf: Our way in secondary matters is correct, but could be wrong

Ibn Hajar al-Haytami reported: Imam al-Nasafi al-Hanafi, may Allah have mercy on him, said, “When we are asked about our way and the way of those who disagree with us in the branches of the religion, it obligatory for us to answer that our way is correct but could be mistaken, and their way is mistaken but could be correct.”

Source: al-Fatāwá al-Fiqhīyah al-Kubrá 4/313

عن ابن حجر الهيتمي قال الْإِمَامُ النَّسَفِيُّ الْحَنَفِيُّ رَحِمَهُ اللَّهُ تَعَالَى يَجِبُ عَلَيْنَا إذَا سُئِلْنَا عَنْ مَذْهَبِنَا وَمَذْهَبِ مُخَالِفِنَا فِي الْفُرُوعِ أَنْ نُجِيبَ بِأَنَّ مَذْهَبَنَا صَوَابٌ يَحْتَمِلُ الْخَطَأَ وَمَذْهَبَ مُخَالِفِنَا خَطَأٌ يَحْتَمِلُ الصَّوَابَ أَيْ بِنَاءً عَلَى أَنَّ الْمُصِيبَ فِي الْفُرُوعِ وَاحِدٌ وَغَيْرُهُ مُخْطِئٌ مَأْجُورٌ

4/313 الفتاوى الفقهية الكبرى