Science can answer many questions about the world in which we live, but it cannot answer questions that cannot be verified as verification is how the scientific method works. The scientific method works because scientists are able to verify or dismiss a hypothesis based upon the data that they collect. But what about questions such as what is the purpose of life?
Or questions about God? Questions that are subjective in nature, such as trying to understand whether or not there is a purpose to existence cannot be answered by science because there is no way to create a testable hypothesis.
