A Tiny Crevice. In other words, it is also called an affordance, permissiveness, or tolerance. A 5mm hole and a 5mm rod don’t fit perfectly together. If you hit it with a hammer, the rod might go into the hole, but only by forcing it. If they are the same size, they don’t really fit. There needs to be a slight gap to ensure a proper fit, which is known as ‘engineering tolerance.’ In this world, 5mm exists only as a concept and doesn’t truly confirm its existence. For some, ‘tolerance’ might be seen as a mistake or imperfection, but for others, it’s a principle of life that drives the world and should be natural. - Joseph’s “just my thoughts”
The reason pencils can be writing instruments is due to pencil lead. The material used for pencil lead is graphite. The graphite element is carbon (C), and four carbon atoms are combined. One carbon atom can have four bonds and can combine with another element. Diamond is similar to graphite, with four carbon atoms. However, diamonds have four carbon bonds that create a strong covalent bond with other carbon atoms, while graphite has only one weak bond. We can write or draw with a pencil because of this loose combination. When you apply pressure to the pencil with your finger, this weak bond in graphite breaks, leaving some of the crystals damaged. Don’t view it merely as a pencil; it’s a diamond’s cousin. The degree of consanguinity is very, very close. - Joseph’s “just my thoughts”