If a player is standing in the end zone, extends arms back into the field of play to catches a ball, is it TD?

If you're not out of bounds until your foot touches the ground, then isn't the reverse true that you're in the end zone if your foot, knee, elbow or hits the turf first in the end zone? If a player has position in the end zone(feet in end zone touching the turf) and has a ball in their hands, or catches a ball, that hasn't crossed the imaginary plane of the end zone line, and then the player is knocked out of bounds without the ball crossing the imaginary plane, is this a touchdown? Remember, the player is in the end zone.