What is the difference in meaning between saying that it is a fabricated rak'ah and saying that he missed it?
Machine translationRead the Arabic original
Question : What is the difference in meaning?
Answer : The difference between them is that if we say it is a fabricated rak'ah, it means that he joined the imam in the first rak'ah and in the second rak'ah. As for making up the missed prayer, it is obligatory to make it up. We do not say that when the imam reached his place, the prayer becomes invalid. Rather, we say that it remains a fabricated rak'ah.
Answer : The difference between them is that if we say it is a fabricated rak'ah, it means that he joined the imam in the first rak'ah and in the second rak'ah. As for making up the missed prayer, it is obligatory to make it up. We do not say that when the imam reached his place, the prayer becomes invalid. Rather, we say that it remains a fabricated rak'ah.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 1271 - ما الفرق في المعنى في قولنا أنها ركعة ملفقة أو أنها فاتته؟ ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.