It is NOT a decision.
You do not DECIDE what to trust.
You are persuaded whether or not to trust something.
Do you DECIDE to trust a suspension bridge?
No. You decide whether or not to get ON the suspension bridge BASED on whether or not you TRUST it.
You trust it because you HAVE BEEN (passive- something is happening to you. It is not something that you do yourself) persuaded it is trustworthy.
Arminians like Winman teach that people are saved by grace through CHOICE.
The Bible says we are saved by grace through FAITH.
Faith is not choice. Choice is choice. Faith is faith. It is deceptive to conflate the two.
You decide to trust things all the time. When you buy a can of Campbell's Soup at the supermarket, you have made a decision to trust that the contents are indeed safe to eat.
Now, if on the news it was reported that someone was poisoning soup, you might decide not to purchase it again until the person was caught.
Let's say your brake pedal begins to sink a little when you apply it. You may decide it is safe to drive, or you may decide it is not safe to drive.
Let's say you came to a creek with a little wooden bridge over it. You look at the bridge and examine it. It looks strong enough to support your weight, so you decide to walk across. If the bridge begins to creak loudly as you start to walk, you may decide to stop and get off the bridge quickly.
A neighbor that just moved in asks you if they can borrow your car for a few minutes. You really don't know him too well, but he looks like a good guy, so you hand him your keys. That is a decision.
Trust is always a decision, though you may not realize it. Often, as in the case of the soup, you are so accustomed to buying that product you do not realize it is a decision, but it is.
You cannot say you have trusted something or someone unless you have acted on it. If you do not give your neighbor the car keys, you cannot say that you have believed him or trusted him.
You can say that you believe an airplane is safe to fly on, but to trust the plane you must get on. And that is a decision.