Τό γάρ αυτο νοειν έστιν τε καί ειναι.( Fragment of Parmenides, in Plotinus v, I, 8) Some scholar translate it into "Though and being are the same"; others tranlate it as: "For the same thing is there both to be thought of and to be". So the focus is on what "to auto" represents, an object to be thought, or the infinitives "to think" and "to be". If the two infinitives are the subjects, then will the verb remain to be estiv which is singular? If the answer is yes, then there remains truly two possiblities, which one is more probable in your mind?