The Poke Test - Give that ball of dough a firm poke with your finger. If the indentation fills back quickly, you're good to go. If it stays looking like a deep dimple, continue kneading.
I use the water and the whole wheat flour only. After kneading the dough for 15 minutes I poked it. The hole didn't fill up.
Is there a proper way to knead the dough which I may be missing?