Empiricism is the idea that knowledge and scientific theories are derived or extrapolated from sensory experience. But this is wrong: [[Theories are conjectured]] and [[Knowledge is objective]]. Sensory experience helps us choose between theories that have been conjectured, but the conjecture comes first. There is no observation to be made that isn't theory-laden: "Our senses themselves do not say anything. Only our interpretations of them do, and those are very fallible." - [[David Deutsch]] See also: [[People (and the explanations they make) are fallible]]. And [[We don't perceive reality directly]]. Inductivism is the idea that is the idea that knowledge and scientific theories are predictions derived from past sensory experiences. But most of our knowledge doesn't consist of our experiences. For example, no one has experienced the Big Bang. Another problem with inductivism is that it argues the future will be like the past and repeated instances of past experiences should increase that the future will be the same, but this isn't true. An inductivist turkey will have hundreds of days of evidence supporting his theory that the farmer is his friend, until Thanksgiving comes around.