[ethbr1]

Part of it is the monkey/typewriter problem.

Not saying this about parent, but am absolutely saying it about the vaccine skeptic community in general.

If the barrier to asking a question is zero (i.e. someone without a high school biology education can ask a question and be listened to) but the barrier to answering any question to the community's satisfaction is high (i.e. a full study, on exactly that question, controlled for all variables, that shows a clear result) then the effort asymmetry leads to many unanswered questions.

... which the skeptic community then points to to support the belief that there are many legitimate unanswered questions.

[munksbeer]

That is exactly my point.