Do any Christians here have any personal experiences or testimonies of events, in which the ONLY possible explination was involvement from God? Maybe a miracle, or a prayer answered in a way that couldn't haven't been just a coincidence?
As I was preparing to respond, I noticed that your religious preference is deist. Although this will not affect my response, I want to make sure you know that I have at least some idea of where your question is coming from.
In all honesty, I think the answer to your question must logically be "no". More importantly, it must
theologically be a "no".
Logical: In order for an explanation to be accepted as valid, it must be falsifiable. In other words, there needs to be an alternate explanation. This does not make a conclusion untrue, rather, it makes it provable (in the sense of strongly convincing). A circular or unfalsifiable argument has no basis for being convincing or not. In other words, it doesn't fit on the scale; there's no place to put it.
Theological: Now, this is a huge issue of debate within Christianity so there may be some with disagreements, but I'm going to go ahead and explain this from my point of view. Basically, true love requires free will. Free will requires some level of doubt, or at least room for an alternative choice. Thus, if God were to reveal Himself in an undeniable way, it would prevent an alternative option and therefore negate free will. Evidence foe God may be
extremely convincing, but without a viable (however slightly) alternative, there's no free will and no true love (which is a foundational belief within Christianity).
When it comes to my life personally, Christianity is hands down the most convincing solution to all of life's big (and small) questions as I understand them from a holistic standpoint. Do I still have my doubts? Yes, from certain angles some aspects seem questionable, but no other worldview come as close as Christianity does to really making sense. I've had many experiences and witnessed and been a part of many testimonies that fit in perfectly with my worldview as a Christian and nothing else comes as close to explaining their origin both individually and as a whole as God does. I don't know if this answered your question in the OP, but perhaps it answered a deeper one that you weren't asking (at least not directly). If this was unhelpful, so be it; but I hope and pray that it was.
God bless,
GP