Tort law (civil lawsuit) is by the burden of proof by the PREPONDERANCE OF EVIDENCE.

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preponderance noun dominance, domination, outweighing, paramountcy, plurality, predominance, predomination, preeminence, prepollence, prepollency, preponderancy, preponderation, prevalence, superiority Associated concepts: preponderance of the credible evidence

IP Addresses are not preeminent evidence.