David Hume is an 18th-century philosopher known for empiricism and skepticism. In Intro to Philosophy, he is the thinker who argues that we do not rationally prove causation or induction, we form those beliefs from habit.
David Hume is the philosopher you turn to when a philosophy class starts asking why we trust experience, cause and effect, or general rules built from repeated observations. In Intro to Philosophy, he is one of the clearest voices for empiricism and one of the sharpest critics of certainty.
Hume’s basic idea is that human knowledge begins with experience. We do not start with perfect, built-in access to the world. Instead, we get impressions through our senses, and then the mind builds ideas from those impressions. That makes him a major empiricist, because he treats observation as the starting point for knowledge.
The famous Hume move is his challenge to induction. Inductive reasoning is when you notice a pattern in specific cases and then infer a general rule. If the sun has risen every day, you expect it to rise tomorrow. Hume asks: what justifies that leap? You cannot prove it by logic alone, because the future is not identical to the past. And you cannot prove it by experience without circling back to the same assumption that the future will resemble the past.
That critique leads into his view of causation. When we say one event caused another, Hume argues, we are not sensing a hidden causal power. We are only seeing one event constantly follow another, over and over again. After enough repetition, the mind grows used to the pattern and expects it to continue. So causal belief comes from habit and custom, not from a direct rational insight into necessary connection.
This is why Hume matters so much in skepticism. He does not say knowledge is impossible in every sense, but he does show that some of the beliefs we treat as obvious, especially causation and induction, rest on weaker ground than we first think. That makes him a central figure for anyone studying the limits of reason and the role of experience in knowledge.
In a class discussion, Hume often shows up as the philosopher who forces you to separate what you observe from what you assume. If you say, “this always happens, so it must happen again,” Hume is the one asking you to justify that step.
David Hume matters in Intro to Philosophy because he gives you a clear way to test whether a belief comes from observation, logic, or habit. That matters every time the course asks you to explain how we know anything at all.
His critique of induction shows up whenever you try to move from a pattern to a prediction. A philosophy teacher might ask why repeated experience does not guarantee a future result, or why science depends on assumptions it cannot fully prove. Hume gives you the vocabulary to answer that: we rely on experience, but we cannot use experience to prove the reliability of experience without circular reasoning.
He also gives you a serious way to talk about skepticism without reducing it to “doubting everything.” Hume’s skepticism is targeted. He questions claims about necessary causation and the certainty of our inferences, which makes him more precise than a vague “I’m not sure” attitude.
In essay work, Hume is useful for comparing philosophers. You can place him against rationalists who think reason alone can reach deeper truths, or connect him to later debates about science, probability, and what counts as evidence. He is also a strong example of how a philosopher can be both skeptical and practical, since everyday life still runs on habits of expectation even if those habits are not logically guaranteed.
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view galleryEmpiricism
Hume is one of the best-known empiricists, so this is the starting point for understanding his philosophy. He thinks knowledge begins with experience, not with innate ideas or pure reason. In class, you may compare his view to other philosophers who give reason a bigger job than Hume does.
Skepticism
Hume uses skepticism in a focused way, especially when he questions whether we can justify induction or causation. He does not deny everyday life, but he does pressure the foundations of our certainty. That makes him a good example of philosophical skepticism that is careful rather than extreme.
Causation
Hume’s view of causation is one of his most famous ideas. He argues that we observe events happening together in patterns, but we never directly observe a necessary causal force. This helps explain why people often mistake repeated sequence for proof of causation.
Underdetermination
Hume connects well to underdetermination because the same observations can sometimes fit more than one explanation. If your evidence only shows that events usually happen together, it may not fully prove why they happen together. That’s a useful move when analyzing whether evidence really settles a claim.
A quiz question or essay prompt on David Hume usually asks you to identify his argument about induction, causation, or skepticism and then apply it to a short scenario. You might be given a statement like, “The sun has risen every day, so it will rise tomorrow,” and asked to explain why Hume says that belief is based on habit rather than logical proof.
You may also need to distinguish Hume from philosophers who trust reason more strongly. A strong answer uses the terms empiricism, induction, and causation correctly, then shows the chain of thought: repeated experience creates expectation, but expectation is not the same as necessary proof.
If the prompt is a passage analysis, look for words about custom, habit, repeated observation, or the limits of certainty. Those are the clues that the text is Humean. In discussion or short response, you can use him to explain why scientific prediction is useful without being absolutely certain.
Aristotle is often confused with Hume because both matter for reasoning and explanation, but they are not doing the same thing. Aristotle is a much earlier philosopher whose work is tied to formal logic, categories, and causes in a more structured metaphysical system. Hume is far more skeptical about whether we can know causation itself, especially through experience.
David Hume is the philosopher who questions whether we can justify induction and causation through reason alone.
He is a major empiricist, so he starts knowledge with sense experience instead of innate ideas.
Hume’s skepticism is focused on the limits of what we can really prove, not just on doubting everything for no reason.
His critique of causation says we observe constant conjunction, then form habits of expectation, but we do not observe necessary connection directly.
In Intro to Philosophy, Hume is a go-to example when you need to explain how experience, habit, and uncertainty shape knowledge.
David Hume is an 18th-century philosopher best known for empiricism and skepticism. In Intro to Philosophy, he is the thinker who argues that our beliefs about causation and induction come from experience and habit, not from certain logical proof.
Hume argued that we never directly observe a necessary causal power. We only see events happen together repeatedly, and then the mind expects the pattern to continue. That means causation is something we infer from habit, not something we perceive as a guaranteed connection.
Hume shows that some everyday beliefs rest on weaker foundations than we assume. He does not say you can never know anything, but he does argue that induction and causation cannot be proven with absolute certainty. That makes him a major figure in epistemological skepticism.
No. Hume is not rejecting science or everyday reasoning. He is pointing out that scientific prediction depends on the assumption that nature will stay regular, and that assumption cannot be proven by logic alone. His point is about the limits of justification, not a rejection of practical knowledge.