Beware of the Leopard?
Not really feeling it, are you?
In computing jargon, erasure is as simple as unlinking. The data's still there, but there's no direct path to its retrieval. It's the electronic version of 'in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying 'Beware of the Leopard.”'
In legal jargon, erasure has a very definite meaning, closer to the common sense concept of erasure: the data's gone. This type of erasure in computing jargon means scrubbing; whether that's overwriting with zeroes, or "dd </dev/urandom >/that/guy" in a loop fifteen times with an upside-down chicken on your left elbow.
Of course if you scrub something, you should log it...