Apart from this example being overly reductive and not rooted in reality, the hypothetical Jimmy would eventually be replaced by someone else who would invent this pencil.
There is no truth that needs a single person to be uncovered. There are infinitely many people able to invent the pencil given enough tries and time. This also makes the argument of original thought not being original.
We are made and influenced by our surroundings and thus the ideas we form must necessarily be a product of those surroundings.
So, even if Jimmy had the idea to "invent" the pencil, he will not be the first one who did. He might be the first one with enough capital to execute (as in buy machines and factories, hire workers and exploit them for their labor and scale the business to planet-scale) and this is where it gets ugly.