«إن أمكن جبر النقصان بالمثل ينجبر به، وإلا يسقط حكم النقصان إلا في الإثم»
When a deficiency can be remedied by an equivalent corrective act, it is remedied; otherwise, aspects of its legal effect may lapse while culpability can remain.
The book’s note gives prostration of forgetfulness in connection with an omitted Fatiha, while pointing out that replacing an essential pillar with something having no legal basis does not validate the prayer.
Two questions must therefore be distinguished:
1. Was the underlying religious act constituted?
2. Is there a recognized means to rectify the particular defect?