Philosophy of Everything

Reality is pretty complex, alright... Normally we expect reality to be far more complex than we can comprehend in a limited human mind. Each time we look to one object, many other objects go outside our perception field, even if the eye can still see them. And this is OK, because we have only a limited processing brain power for perceiving the reality. It's not only the limit of perceiving reality, there is also a limit in our capacity of "knowing" about reality. If we think about it, it is very intuitive: the physical mind is far smaller than the reality we want to know about. In order to know about reality, we need to have a model about reality stored inside our minds.

We know that cancer is when some human cells are multiplying very fast and then spread all over the organism. The are many substances that seems to be "cancerigenic". However, recently we started to link some cancers to bacterial or viral infections. What is more probable: that a chemical substance makes a cell to multiply and spread, or some viral/bacterial DNA is reprogramming cells to multiply and spread?