* A JW family leave their crops and livestock unattained to go to a convention. When they return, the crops and livestock are doing just fine.
* A desperate person is anxiously praying to God to give her a chance to know Him. Even before the prayer is concluded, two JWs knock at her door.
* A pioneer prefers to take leave from her work in order to attend the Pioneer School, even though she's sure she'll be fired. When she returns, she learns that she has kept the job.
* A head of family decides to quit his job because it conficts with meetings and field service. Later, he finds a better-paying job with less hours.
* A teen JW decides to leave the truth and live a worldly life. A few years later he's a complete fail: drugs, depression, and between prison sentences.
What do all of the above stories have in common, provided that they are true and accurate?
In the WTS's official explanation, they are a proof that what the Organization teaches is always correct: that God provides when we obey his instructions, that angels guide the jws to find 'sheep', that failure is guaranteed if you leave the truth, etc.
In reality, these are all examples of Selection Bias, or as some call it, Selective Statistics.
Selective statistics is when you have a population from which to draw conclusions and you select only the samples that suit your story; the rest you just ignore them. It's easy to see that selective statistics is at the heart of most of extraordinary JW claims.
In the above-mentioned examples, consider: How many witnesses have taken absence from their work for 'theocratic' purposes and not got their job back? How many pioneers try like crazy to find a job and yet remain practically unemployed? How many jws in developing countries have left their crops/houses to attend convention and found them plundered or ruined? How many desperate people all around the globe pray every day to know God and God does not send his witnesses right after? How many young jws have left the 'truth' and have not failed in their life? No-one, not even one? Or is it the majority? Even if few of this counnter-expamples existed (they're not few), they would automatically debunk JW claims about 'Heveanly intervention'. Either way, pure (and not selective) statistics show that in the worldwide JW population, all these things follow a normal pattern as with every other population ...However, the examples that do not serve our 'purpose' have to be left out! Or else, how are we going to persuade the ignorant sheep, that don't have a clue about statistics and critical thinking?
(As you can imagine, selective statistics debunks not only the JW's claims, but also a lot of extraordinary claims like homeopathy, telepathy, etc, but this exceeds the purposes of this topic. There are a lot of good books on the subject, like Ben Goldacre's Bad Science and Michael Shermer's Why people believe weird things.)