*** Note:
Harvard Scholars translated patanjali’s sutras which I believe were actually either created or influenced during buddha’s time.
Patanjali’s word for “ignorance” is avijja however they translated avijja as “undifferentiated consciousness”. My research has discovered that the citta or consciousness is “undifferentiated” because it is not differentiated from it’s object. As we know citta attaches to it’s object, upadana. So I firmly believe patanajali was using the term ignorance to describe to same phenomena we use the word upa+dana or attachment but in a different context. The citta is attaching and identifying with it’s object, which patanjali essentially calls ignorance…
It is also quite possible, he was talking about the hadaya vatthu and the moment that the citta “references” it’s object with either love or hatred. This “differentiation” of love/hate is also likely ignorance he was speaking of.
However it is this very “attaching” I believe that causes the perception of time and hence the entire mundane world of the conventional mind or reality. I could easily be mixing up some things here, and while that may be true I think it stills adds a bit to my post above.