Lym International Pty Ltd v Marcolongo  NSWCA 303. Basten JA.
4. Appeals to "commonsense" in the context of findings as to causation are usually little more than an exhortation to avoid over-sophisticated analysis. That exhortation should generally be accepted.
The point at which careful analysis becomes necessary, and reliance on "common sense" unhelpful, is where there is a real risk that "common sense" conceals fallacious assumptions, illogical reasoning or plain careless thinking. This case does not raise such risks.