Evidence that an accused previously injured a victim is irrelevant to the purely objective element of unlawful and dangerous act manslaughter (whether a reasonable person would have appreciated an appreciable risk of serious injury), because the accused's prior conduct cannot bear on an objective assessment. Where the prosecution eschews cross-admissibility and the evidence on one charge is irrelevant to another, severance will be ordered if the risk of misuse of evidence cannot be cured by judicial direction. New arguments cannot be raised for the first time on interlocutory appeal.
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