We can't ascertain that ever ... Realized long time back by Sanskrit gurus .. they said

Purnamadah Purnamidam Purnat

purnamudachyate.

Purnasya Purnamadaya Purnamevavashisyate.

.. meaning,

“That is whole, this is whole, from whole comes out whole. If Whole is subtracted from whole, still whole is left.”

The whole is Rabbithole :-)