Reasonable doubt is the criminal law standard, and is relatively hard to achieve since any credible theory by the defense can undermine it. This is a civil law

Reasonable doubt is the criminal law standard, and is relatively hard to achieve since any credible theory by the defense can undermine it. This is a civil lawsuit, so probably goes to preponderance of evidence. That's a lot easier--the plaintiff only has to prove it's more likely than not that the defendant was liable. Jury or not doesn't really come into it, except that formal criminal trials (above an infraction, at least) always involve a jury.