There are times when a child can receive up to 6 vaccines at the same time and that's a little bit shocking.
Yes, they get a preparation that is called Hexavac. It is one shot with six vaccines. It works. And you prefer your child to get six shots? Six times in a doctor's office, six times being pierced, being hurt and feeling dizzy afterwards? I prefer Hexavac everytime (and both my children got it).
So you have three group of people: Those who don't know anything, and who indeed are the worst predictors, then those who have some basic understanding of the situation, who are the best predictors, and then the specialists, who know intricate details and have very profound knowledge, who aren't very good at predicting because they give too much weight to single aspects and have some very strong opinions or emotions about the situation which blinds their judgement.
Homeopathy is indistinguishable from, "Take good holistic care of yourself and keep psychologically strong!" - two important pieces of advice which are significant to health. If medicines alone were so effective, you wouldn't need to do the whole double-blind placebo-controlled trial thing, would you? It'd be obvious from the medicine's effect alone.
Not quite. You need the double-blind placebo-controlled randomized studies because medicines are not the only source of improving health. We are able to overcome most illness by ourself. Our tissues can regrow, we have an immune system to fight of diseases, and our liver and kidneys getting us rid of toxins all the time. If medicine was the only game in town, then yes, we could just do a simple before-after analysis and see solely the effects of medicine. As we have enough abilities to self-heal, and we are constantly under other internal and external influences (diets, environmental influences, behaviour etc.pp.), we have to filter out the effects of medicines against all those other influences, and thus we need those complicated settings for medical studies.
So in each country where the Minister of Interior affairs or a top police officer was always pressuring for a data retetion law, there was probably a data retention program already in place, whose results were just unusable in public (e.g. in court).
There are two ways to write error-free programs; only the third one works.