Light heartedly, what I thought of on seeing the thread title, was signage, like road signs and signs in buildings to supposedly guide me. I can see and touch them, so, yes I do believe in them, but often they do not seem to be easy to understand. I'm often confused by signs.
Okay, I was on the fence with this, too. I was hoping for the one but expecting the other. It was the reverse. So I was driving through a city I'm not familiar with last weekend and followed the sign for my exit. About a half hour later, it occurred to me the light was glinting the wrong way off the clouds--I was heading west, not east! A couple of days later, I came to the same exist, again, and instantly understood my problem. The signage in that state comes before the exit ramp, but I've lived in states where it comes at or beside the exit ramp. At that exit ramp, sure enough, was the sign saying east and a big 'ole arrow pointing west. Arrgghhh!
But about the neoHumean's take on miracles, it may help to know Hume's position against miracles is quite circular.
Signs, both figurative and literal are wide open to misinterpretation… probably best to not take them too seriously in my case. Just a bit of mystical fun!