Scientists first make observations that raise a particular question. In order to explain the observed phenomenon, they develop a number of possible explanations, or hypotheses. This is the inductive part of science, observing and constructing plausible arguments for why an event occurred.
As indicated earlier, the Bible does not fix the age of the earth, contrary to the claims of Answers in Genesis. Historically, their claim comes from the work of James Ussher, Bishop in the Church of Ireland, from 1625 to 1656.
In determining the Age of the Earth, scientists must make assumptions that seem reasonable based on observable data. Certainty and assumption are contrary to each other. Therefore, the study of the Age of the Earth is a feasibility study.. Age of the Earth: Young Earth vs. Old Earth.