I have a nice example in which it turned out that I do have free will. It's particular though, so enjoy the story.

I was working at a hotel, and I would sleep over to help with breakfast and then go home.

I dreamt that I had just finished the shift and was jaywalking to go to my bus stop when a car veered around the corner, me in the middle of the road, and the driver angry at me, and my yelling back that he should not be speeding.

Then, I woke up, and finished my shift. I started to walk across the street, jaywalking, when I remembered the dream. I almost ignored the dream, but then I decided to walk back to the sidewalk and go to the corner.

The same car and the same driver of my dream sped across the corner. I saw the guy's face real well, just like I had in my dream, and it was almost as if he recognized me, too, surprised that I was not in his way but walking on the sidewalk.

--

First off, there are many parts known in the dream. Me, the street, and then also the car and the driver.

For some reason, I saw the outcome in a dream. As if reality is indeed set in stone. As if future events do send back their information. As the owner of my brain, I was able to pick up the information of what was going to happen. Like a recorder playing the same record, though in this case a future record played just a single time.

But then... I changed my mind.

I remembered my dream, and the outcome ended up not being what I had dreamt, while everything else in the dream remained the same, played out indeed.

The funny part is that I discovered I did have free will based on this strange experience. I changed my mind. Everything was the same as in my dream, except I changed my mind. I was already off the sidewalk, starting to jaywalk. Had I not remembered the dream, I would have experienced the speeding car with myself caught in the wrong spot in the street.

I have free will. I decide what to do when I walk out the door: go left, go right, go straight, go back into the house.

I do not have free will in the bigger scheme of things. If I want to go live on Mars, then it is impossible for me to make that happen (for one, I am too old to see the first people go live on planet Mars).

But I have free will in my own little sphere of influence.