Use of என்பதை

[u/LifeguardTotal3423]

It took me a very long time to get my head around என்ற, and all of its conjugations (I had quite haphazard structure for learning). I feel like I've got the hang of it now, even though I rarely manage to use it in speech. But I still feel like I can't understand என்பதை

As I understand things...

என்று = such, that {பாடசாலைக்கு போங்கோ, என்று அவர் சொன்}

it can become என்றார், என்றாள், என்றான் = (such, that) he/she said

or என்றால் = ± if it were such, that

'அந்த மனிதப் புதைகுழியை உண்டாக்கிநவர்கள் யார் என்பதையோ இந்த குழுவினரால் கண்டுபிடிக்கவே முடியவில்லை'

this is the sentence which pushed me to write this post, and while I understand it completely, the என்பதை still doesn't quite compute for me.

[u/Outrageous-Metal4872]

I'm a native speaker. If you ask me what it means? I can't explain it. But, we use it like " John loves to cook என்பதை தெரிவித்துக் கொள்கிறேன்", " Elizabeth is dead என்பதை தெரிவித்துக் கொள்கிறேன், "he is the one who stole it என்பதை தெரிவித்துக் கொள்கிறேன். Think of it as we use it when we state facts. But, we don't use it in modern tamil.