I had a bunch of tiny little nags that always bothered me about The Bible/God/etc. that eventually led to me drifting away, but this was my personal, singular issue that no one could address. I think I mentioned it before here, but, for summation again:
As a late teen, I got into web programming. That got me to think more logically, as I was constantly dealing with logical rules that followed logical progression. It began training my brain to completely think in those kinds of terms.
One day, I had to give a #4 talk about Adam and Eve or something, and the simplest thing just clicked:
1) What makes a person is a combination of their biology, experiences, and how their biology impacts their experiences. Our brains are essentially really, really complex computers, our programming is set by a mix of our initial birthing and the experiences it is exposed to.
2) As such, we have no -actual- control over what we do because our actions are dictated by how our brains work, which is dictated by our biology and experiences up until the point in which we make a decision.
3) While us making mistakes and "going bad" falls under the umbrella of "imperfection" with certain Christian theology, Adam, Eve, and Satan were created "perfect" and did not have that starting flaw.
4) If God created their biology (or spirit biology), and created the environment that they were placed in, then God is by default, at fault because he made something that would inevitably turn out badly. It is EXACTLY the same as me programming an application, and it failing, and me blaming the application for failing because "I made it perfectly, it decided to fail on its own."
5) Therefore, God makes mistakes and isn't as smart as Christianity makes him out to be, correct?
I raised these (irrefutable) points to parents and elders, and got the same ridiculous answers from all. Basically, in answer to all of my questions:
1) "Yes, that is what makes a person."
2) "We do have control over our decisions because we're free moral agents with free will."
This is the first break. I would always respond with, "But you just said, as biological organisms, we are a result of our biology and environment. That means all of our choices are illusions by default; an intelligent enough brain that saw every bit of our biology and influence would be able to predict every single thing we did before we did it for that reason!"
The response would always show a bit of anger or irritation, and then a shift in questioning. "Are you saying people aren't responsible for their own actions?" would be the general response. I would normally say something non-committal like "I'm not saying anything, I just raised two points in combination with each other that we all agree on, so how does that work?"
The same with 3/4/5. Same exact breaks. The repeat of the catchphrase "free moral agents." "But God created them, he MADE how their braisn work, he made a brain that would inevitably go wrong if placed in that environment!" And the response, "Are you saying God isn't perfect?!" And the same refusal to get caught in a future disfellowshipping-trap.
When I -did- give the talk; I tried something. I basically stated; "Hey, when it all comes down to it, no matter how fair or not fair things may seem - we are God's creations, and as creations of his, he has the right to get rid of us if he feels like it. It's just him being kind enough not to just get rid of all of us that keeps us here." This is basically an accurate representation of the OT God, in my opinion, and says that people are just whims he can get rid of via "might makes right."
...People in the audience nodded, and after the talk a couple of people came up to me and said I made a great point, and they had never thought about it that way, and it made them feel even better about staying in Jehovah's graces. I was incredulous.
That was when the scales were lifted from my eyes more than anything that I can recall. After that, cognitive dissonace and a lot of the logical contradictions in the Bible and Christianity, including and especially JW beliefs and practices, fell completely into place. And it was that road that led me to where I am now.
How about you guys? Any logical issues that just ended up being the "lightning bolt" that finally hit you?