Unsymbolized is a weird choice of term. I specifically mostly think without words and cannot form "realistic photo" images in my head, but I am most definitely using symbols.
If I have to make a considered choice from multiple alternatives, I can imagine[1] them as undescribable objects (not anything matching the real world) imbued with all their meanings, and I can observe their properties such as one is cheaper and the other takes longer as if they were properties like weight or color, and I can mentally rearrange them around in a virtual space. These things are clearly symbols representing the alternatives.
[1]: Visualize seems like the wrong word. These things might not have actual shapes, colors, etc. Spatialize?
If I have to make a considered choice from multiple alternatives, I can imagine[1] them as undescribable objects (not anything matching the real world) imbued with all their meanings, and I can observe their properties such as one is cheaper and the other takes longer as if they were properties like weight or color, and I can mentally rearrange them around in a virtual space. These things are clearly symbols representing the alternatives.
[1]: Visualize seems like the wrong word. These things might not have actual shapes, colors, etc. Spatialize?