Consider the following.
Argument from thought experiment
Pick a random country. Any country. Notice the process that you are going through. Notice how it feels to make a “choice”. Notice that this, if anything, is going to be the freest choice that you make in your life. You have all the countries and all the time you want to pick a country.
Let’s now examine this process. Within the first 3 seconds of being confronted with this question, you were faced with a blank, where nothing occurred to you. After this period of blankness, random countries would pop into your head, and you likely had two or three countries. Let’s say that you had the countries Japan and Australia in mind.
There are two things we can observe at this stage.
1. You cannot think of a country you don’t know
2. You cannot think of a country that didn’t occur to you.
The first is obvious. You can’t think that you don’t know. The second has larger implications that you would think, as everything must occur to you before you can consider it. But by using the term “occurring”, is like saying the thought “crossed my mind” or “dawn on me”. The process of something occurring to me is completely random. I cannot control what occurs to me, that is the nature of something occurring.
You may still be unconvinced. If I were to ask you why Japan and Australia occurred to you, you may say that “I recently ate sushi, so Japan occurred to me”. Notice that Japan occurred to you as a product of a memory of which occurred to you (note that you did not choose for this memory to occur, it just did). The question still remains. Why did that memory occur to you? Well, you may say something like I enjoyed the taste of sushi. Even so, the question still remains, why did enjoyment have that particular effect on you? Why didn’t you think “God, I had some awful Chinese take away a week ago, and that memory occurred to me, so China occurred to me”. Why didn’t China occur to you on the same reasoning?
Nevertheless, psychologists know that if subjects are placed in the hands of a good experimenter exposed to an independent variable, they usually have no idea what is influencing them. If you were to give your business partner a hot beverage to hold as opposed to a cold one, they would more likely cooperate with you and when asked why they did what they did, they would usually, never say “well I was holding a coffee instead of a beer”.
We’ve now established that the countries Japan and Australia occurred to you, for if they didn’t occur to you, you wouldn’t have been able to choose them. Imagine that you chose Japan, and I asked you for justification for your choice. Why choose Australia over Japan? When justifying your choice, you will run into the same issue as before. You may say "Well I've went to Australia a month ago so I decided to choose Australia". The question then becomes why did going to Australia have the effect that it had on you? Why didn't you say "well I went to Australia a month ago, let's go with something else".