I think this phenomenon is starting to extend to every field. For example, My wife's car would sometimes fail to start. However, later it would start with no p

I think this phenomenon is starting to extend to every field. For example, My wife's car would sometimes fail to start. However, later it would start with no problems. After a while I noticed it had a much higher no start rate when it was raining outside. We took it to the shop and I explained the situation, so they did a "wet test" and it turned up nothing. They explained that they were powerless to fix it without being able to reproduce it. I wasn't satisfied with that answer so I did my own research on google with the make/model of the car and concluded pretty quickly that the distributor cap was the problem. I took it back to the shop and specifically requested that they replace the distributor cap. They did, and the problem was resolved.