أَوْ أَفْطَرَ وَهُوَ يَرَى أَنَّ الشَّمْسَ قَدْ غَرَبَتْ
Translation: Or one who broke the fast believing that the sun had already set.
In the second case, the person believed sunset had occurred and broke the fast, but the sun had in fact not yet set. The error became clear afterward.
This differs from a person who knowingly breaks a fast before sunset. Quduri’s passage is about a mistaken judgment of the time.