ANSWER
Radical relativism, as embraced by post-structuralism, posits that all meanings and truths are contingent on context, power, and language, with no objective or universal foundation. This undermines meaningful communication in several ways:
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Lack of Shared Ground: If meanings are entirely context-dependent, there is no stable basis for mutual understanding. Communication relies on shared assumptions and references, which radical relativism denies.
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Infinite Interpretations: Without fixed meanings, any text or statement can be interpreted in countless ways, making it impossible to convey a clear or consistent message.
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Erosion of Trust: If truth is always contingent and shaped by power, it becomes difficult to trust any claim or argument, as they are seen as products of manipulation rather than genuine understanding.
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Paralysis of Critique: If all perspectives are equally valid and contingent, it becomes challenging to critique or challenge dominant narratives, as there is no objective standard to appeal to.
In essence, radical relativism destabilizes the very foundations of communication, making it difficult to achieve shared understanding, consensus, or meaningful dialogue.