本月初某些管理方式的变化暗示，答案是否定的：商业银行业务同零售银行业务分离，使得巴克莱零售业务如今成为独立性的全球业务部门。
A hint that it might not was implied in some management changes earlier this month: commercial and retail banking were split so that Barclays' retail banking is now a distinct global unit.
为此，定义了命题公式的正变换和负变换，以便分离一个文字与其否定的语义联系。
To this end, the positive and negative transformations of propositional formulas are defined such that the semantic link between a literal and its negation is split.
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