User blog comment:Gundam Legilis/RWBY Schedule/@comment-11188061-20150521020309/@comment-25555436-20150521033809

They know what things increases the possibility, but they don't know what triggers it exactly. They can't tell you how to prevent it like with other diseases because they don't know what causes it, they can only tell you how to lower the chances. For example, they say smoking causes lung cancer, but there are millions of people that never smoke and still get lung cancer.