If all you have is your physical brain which is not designed and you don’t have a soul and a mind,isn’t your brain just an unguided random process?and if it is than how do you trust it?and if it isn’t than how is it better explained by chance rather than a designer?and if we do have a mind isn’t that better explained by design rather than chance?

i am just gonna say it the way J. Warner Wallace said it:

if all you have is a physical brain,that means that all there is happening is just the physical events in your brain,neurons firing,causing the next neuron to fire,but that mean this neuron was caused by a prior neuron,and that goes back in a sequence.

Basically everything you do and say is caused by a prior event in your brain,but we know we don't work that way though.

“Supposing there was no intelligence behind the universe, no creative mind. In that case, nobody designed my brain for the purpose of thinking. It is merely that when the atoms inside my skull happen, for physical or chemical reasons, to arrange themselves in a certain way, this gives me, as a by-product, the sensation I call thought. But, if so, how can I trust my own thinking to be true? It's like upsetting a milk jug and hoping that the way it splashes itself will give you a map of London. But if I can't trust my own thinking, of course I can't trust the arguments leading to Atheism, and therefore have no reason to be an Atheist, or anything else. Unless I believe in God, I cannot believe in thought: so I can never use thought to disbelieve in God.” - C.S. Lewis

Also as a naturalist/materialist you have to deny every spiritual claim/experience in history

and just as Frank Turek says:is that possible?Yes. Is it reasonable?i don't think so.

i explain more in the ''evolution'' article

https://theism-examined.site123.me/arguments-defense-islam-etc/evolution