0I am not sure I understand your question, Hela. On the face of it, it is the same rationale as in other contexts: 02br 02br 00a) 'I regretted ever having written the / that letter'-- speaker is referring to a specific letter. 02br 02br 00b) 'I regretted ever having written a letter'-- speaker is bemoaning the action of writing any letter at all.
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