I am a big fan of the unsaid obvious. Perhaps the best example was the fact that AIDS is passed by anal intercourse. Sorry Magic. This deference of reality to propriety demonstrates the dangers of hypocrisy. I remember the idiot virgin clubs where they proudly refrained from sex, because of all the dangers, then got that goofy sly look and mumbled about other things you could do.
Lazy eye is a good current example. If you look up strabismus, they will tell you that the cause is unknown. This is a lie. If you look up fetal alcohol syndrome, one of the symptoms is strabismus. It may be that there are other causes. But fetal alcohol causes strabismus. If you have a cast to your eye, perhaps your arms and your temper are a little short; chances are Mom was hitting it. Some people might consider this a lapse in good taste, but I think it is preferable to recognize a developmental disorder rather than a hereditary one.
If they were truthful rather than pusillanimous they would say that fetal alcohol is the only known cause of strabismus.