Some of that information is derived from "experience reports," which are descriptive accounts of drug trips that anyone can submit.
A posteriori knowledge, knowledge derived from experience, as opposed to a priori knowledge.
These figures inflected their stories with a world-weary cynicism, derived from experience, about the motives and intentions of their clients and cases.
Being intuitive meant that one had a gift of insight, a kind of natural perceptiveness that was not derived from experience.
The fact that space and time are forms of possible experience, rather than generalizations derived from experience, explains how the judgments of geometry, for example, can be both empirical (about experience) and knowable a priori.
A priori knowledge, in Western philosophy since the time of Immanuel Kant, knowledge that is independent of all particular experiences, as opposed to a posteriori knowledge, which derives from experience.
Other theories claim that genetic factors are inconsequential and that emotions are cognitively constructed or derived from experience, especially from socialization and learning (see below Social structures of emotion).
Even John Locke (1632 1704), considered the father of modern empiricism, thought that there is some knowledge that does not derive from experience, though he held that it was "trifling" and empty of content.
In fact, we often don't have time to do anything except rely on gut instincts derived from experience, theory, conjecture, ideology and a wide variety of other influences.
Second, we have certainty with respect to quite a lot of causal judgments derived from experience.
('Pure' means 'not derived from experience'.) These claims are very problematic.
