California, United States of America
The following excerpt is from Hais v. Universal Prot. Serv., LP, B283654 (Cal. App. 2018):
To show causation, a plaintiff must "establish, by nonspeculative evidence, some actual causal link between the plaintiff's injury" and the defendant's act or omission. (Saelzler v. Advanced Group 400 (2001) 25 Cal.4th 763, 774 (Saelzler).) "'[P]roof of causation cannot be based on mere speculation, conjecture and inferences drawn from other inferences to reach a conclusion unsupported by any real evidence.'" (Id. at p. 775.)
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