I probably should have said provide enough information to convince a jury or a judge as the case may be. You are correct that the standards of proof in a civil case are not near as high as in a criminal case.
Civil trials you win with 'a preponderance of evidence' or 'clear and convincing evidence'. As long as you tip the scales of justice in your favor, you win. it doesn't matter how far from 50/50. As long as you tip the scales your way. 50.0001/49.9999 gets you a judgement in your favor.
In criminal trails you must prove the case 'beyond a reasonable doubt.'