I am agnostic about a lot of things. Is solipsism true? I don't know. Is hard determinism true? I don't know. Do souls exist? I don't know. Is anyone responsible for the choices they make? I don't know.
I am completely certain of the following:
1. I am conscious.
2. I am typing in English.
3. I am not all-knowing.
4. I am not all-powerful.
5. I change.
6. Concepts e.g. the definition of squares, circles, triangles, etc.
7. I can't do lots of things I really want to do e.g. go back in time and prevent all suffering, inequality, injustice, and deaths and make all living things forever happy.
8. I do some things even though I don't want to do them. Here are some things I have done, currently do or will do even though I don't want to do them:
1. Breathe
2. Eat
3. Drink
4. Sleep
5. Dream
7. Pee
8. Poo
9. Fart
10. Burp
11. Sneeze
12. Cough
13. Age
14. Get ill
15. Get injured
16. Sweat
17. Cry
18. Suffer
19. Snore
20. Think
21. Feel
22. Choose
23. Be conceived
24. Be born
25. Remember some events that I don't want to remember
26. Forget information that I want to remember
27. Die
I am almost certain of the following:
1. I and all the other organisms currently alive will die. Every second brings all organisms closer to death.
2. My body, other organisms, the Earth and the Universe really exist and they are not part of a simulation or hallucination or dream or illusion.
3. Other organisms e.g. humans, cows, dogs, cats, chickens, pigs, lions, elephants, butterflies, whales, dolphins, etc. are sentient beings who feel pain.
4. Being a non-consumer is more ethical than being an autotroph, being an autotroph is more ethical than being a vegan/herbivore, being a vegan is more ethical than being a vegetarian, and being a vegetarian is more ethical than being an omnivore or carnivore.
5. Gods do not exist.
6. Souls do not exist.
7. Reincarnation does not happen.
8. Resurrection does not happen.
10. Organisms evolved and were not created by God or Gods.
11. 99.9% of all the species to evolve so far on Earth became extinct in 5 mass extinctions long before humans evolved.
12. Humans and other organisms do not have free will. Our wills are determined and constrained by our genes, environments, nutrients, and experiences. The reason I have put this one in the almost certain category is that it is possible that bodies, genes, cells, stars, planets, moons, galaxies, universes may not actually exist. These things could be part of a simulation or dream or hallucination or illusion. It is impossible to know with complete certainty. I could be a solipsistic soul experiencing the illusion of being in a human body on a planet in a universe or I could be a body without any soul - I don't know these things for sure, hence I am an agnostic. There are many hypotheses that can't be tested e.g. simulation hypothesis, illusion hypothesis, dream hypothesis, hallucination hypothesis, solipsism hypothesis, philosophical zombie hypothesis, panpsychism hypothesis, deism hypothesis, theism hypothesis, pantheism hypothesis, panentheism hypothesis, pre-life selection by souls hypothesis, resurrection hypothesis, reincarnation hypothesis, etc. Just because a hypothesis can't be tested it does not mean it is true or false. It just means that it is currently untestable.
My definition of free will is a will that is free from determinants and constraints. To prove me wrong, you would have to do the following:
1. Live forever without consuming any oxygen, fluids, or food.
2. Do things other organisms e.g. tardigrades, dolphins, chameleons, etc. can do.
3. Teleport everywhere and everywhen.
4. Prevent all suffering, inequality, injustice, and deaths.
5. Make all living things (including the dead ones and the never-born ones) forever happy.
6. Be all-loving, all-knowing, and all-powerful and make all the other beings also all-loving, all-knowing, and all-powerful.
7. Own an infinite number of universes and give all beings an infinite number of universes each for free.
Once you have done the above tasks, I will be convinced that you have free will. If I had free will, I would have already done the above tasks.
I don't know the answers to your questions. I am all-loving but I am not all-knowing or all-powerful. I am the Truth Seeker, not the Truth Knower.