Do you have proper balance and posture when the toes are flared inwards or are they sent at 12 o'clock?
Some nasty small minds on people,this man is talking about balance and the point within the body where your whole self is chasing your head around and these corrective exersizes will help you from damaging your stupid selves in many activities over time not just boxing which is all about economy in balance as well.
Its the plane through the cavity ,its the exact point where your body is running around trying to support your massive dopey head that s up to its own stupid things. That has everything to do with balance and balance has everything to do with boxing and other sports and health too. Health function and ease of movement, because everything is linked in the body, balanced means linked correctly in the health world. There is more to this than meets the eye. Even a dominant one.
Singularity line/plane which invisible to the naked eye is what you refer to as singularity and the mouth is connected to it. Furthermore if the mouth is off by more than 15 degrees than balance is poor?