[CecilOne]

Now that we have beat up the commentators and umpires, I have an actual ruling question. Don't remember which game, but it does not matter, just the ongoing application for us.
There was a play when the batter was called out for the ball hitting the bat a second time. The umpire explained to the coach that "her front foot" was on the ground and out of the box when the ball hit the bat (still in her hands).

Regardless of when or who, do you call one foot out and one foot in as out of the box (an out) or in the box (a foul)? I remember a long thread on the forum as concluding that any foot in the box meant in the box. Recently, someone disagreed and then this NCWS umpire said "one foot" out of the box means out of the box.

What do you think/call and is there any written ruling support?