as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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explain the meaning of the expression "to cross the rubicon".
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the expression "to cross the rubicon" is a metaphor which means to take a decisive and irreversible step. it was derived from julius caesar and his army who crossed the rubicon river in 49 bc and took an action which couldn't be undone. it is used to describe an event or decision that is too significant or important to reverse.
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