I had this discussion with a couple of people yesterday.
One took virulently against the idea of switching into the second person (from the first person).
The other thought it was acceptable if used as a way of making the narrator's interior monologue chime with what he/she takes as being the majority view, or as a way of making an individual view seem widely accepted - in the way that people do, quite unconsciously, in daily speech. For example, they'll say:
"You'd've thought he'd've grown out of that sort of thing at his age" |
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Instead of sticking their neck out and making it plain it's their own view:
"I think he should have grown out of that sort of thing at his age" |
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In the sort of example given above, I guess it's a good way of illustrating self-deception - the inability to come to terms with the individuality of one's own views.
But I'm not sure if that's quite what you mean.