The world is flat, not the earth, the earth is round

It's a misunderstanding of words well one word, and I will explain how that works.
Take a ream of A4 paper and a 5 pointed cake star cutter with a very sharp edge. Place the ream of A4 on a flat surface like a bench. Use the cake star cutter and start cutting through about 100 pieces or more or less, if you wish to actually use the paper for future use, somewhere inside the A4 area. Remove both the cake cutter and the inside stars made from the A4 and you will be left with the shape of a 5 star hole that is now 3D and u take the top piece of paper in your hands you have a 5 star hole that is no longer 3D, because it is separate and clearly flat, without being part of the 100 pieces of paper cut into a 5 star in the EXACT same spot you will never get the 3D illusion.

Now imagine the A4 paper and the cut 5-star hole being lifesize and you walking through each piece of paper, it would give you the feeling of you being in a 3D world

Now take this concept and use it on a lifesize scale, of say the street you travel every day without a single thought, and think how many holes required to cut blades of grass in a square metre. Or the ants that live within the blades of grass. There is so much detail in these interactive holes that you are so distracted, from the fact all it is one single picture of many fine cut holes layered over another which gives the perception of movement.

So my point is the world is but a single layered highly detailed picture of holes that we pass giving us the deception of us travelling, interaction and depth on a highly complex level. The sense of hot/cold rough/smooth are all defined by the rules within this world. Which helps make the world we see convince us for it to be real.

I hope this helps explain the world is flat concept if not ask questions. I will answer as best I can