Defend the contact point/unit turns are the two most common causes of errors

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Originally Posted by Ash_Smith

For example, Sureshs uses the term "late" to describe the contact in relation to the ball (where a coach would use on the rise or on the drop) as opposed to a coaches use of "late" to describe the contact in relation to the body (i.e. a contact behind the plane of the body).

Yes, that is the point I was going to make once he confirmed his version of it.
But it is a common misconception & rec players often confuse these terms.