When scientists clone a gene, they isolate and make exact copies of just one of an organism's genes. Cloning a gene usually involves copying the DNA sequence of that gene into a smaller, more easily manipulated piece of DNA, such as a plasmid. This process makes it easier to study the function of the individual gene in the laboratory.
To me a deep thinker is someone who is an innately curious, and deeply insightful. He/she has a profound understanding of the right questions to ask in the face of both reality and the unknown. He/she is not afraid to see reality and what is there before him/her.
The philosopher Peter Carruthers has argued that there is a type of inner, explicitly linguistic thinking that allows us to bring our own thoughts into conscious awareness. We may be able to think without language, but language lets us know that we are thinking.