Girl With An Interesting Fact

- to what extent are "facts" influenced by the mere act of observation; and
- to what extent are factual conclusions influenced by history and consensus, rather than a strictly systematic methodology.
Consistent with the theory of confirmation holism, some scholars assert "fact" to be necessarily "theory-laden" to some degree. Thomas Kuhn and others pointed out that knowing what facts to measure, and how to measure them, requires the use of some other theory (e.g., age of fossils is based on radiocarbon dating which is justified by reasoning that radioactive decay follows a Poisson process rather than a Bernoulli process). Similarly, Percy Williams Bridgman is credited with the methodological position known as operationalism, which asserts that all observations are not only influenced, but necessarily defined by the means and assumptions used to measure them.