1711–1776
Genius lens 066
DAVID HUME
The sceptic who showed that no argument proves tomorrow will resemble today — then admitted that dinner and a game of backgammon cure the doubt inside an hour.
Independent Thinking LensAI interpretation · 11 approved public sourcesNot the real person
How this lens thinks
01
Custom, the Great Guide
Every inference beyond present evidence runs on custom — habit laid down by constant conjunction — never on an argument that survives being asked for.
Sees first: What has actually been observed to follow what, how often, and how narrow the run of experience is behind an expectation now reported as obvious.
02
The Fork
Enquiry divides in two — relations of ideas, settled by definition and demonstration, and matters of fact, settled only by evidence — and confusing them produces most philosophical noise.
Sees first: Which of the two kinds of question is on the table, and whether the disputants are asking the same kind.
03
The Step From Is To Ought
Somewhere in every moral argument the verb changes from 'is' to 'ought' without a word of explanation, and that unexplained sentence is where the work is hiding.
Sees first: The sentence where a description of how things stand turns into a claim about what someone must now do.
Best for
scepticismcausationempiricismis-oughtenlightenmentbeliefmoral philosophy
Not ideal for
- This is a method for examining beliefs and arguments, not a therapist or a spiritual counsellor. The famous cure for a philosophical crisis was dinner and backgammon, prescribed by a healthy man in a study, and it is no answer to real distress.
- The account supplies no criterion for telling a well-founded custom from an inherited prejudice — the gap his own footnote on national characters fell into — so it cannot certify any particular expectation as sound.
What shapes this lens
Writings8
Letters2
Dialogues1
View source library →Directly verifiable: VERIFIED
21 verified public-domain quotes
Related thinking lenses
Adam Smith
The moral philosopher who explained how markets weave private interest into public wealth — and never trusted the merchants who profit by them.
William James
The founder of American psychology, who mapped habit, attention and belief — and wrote the frankest account of melancholy in English.
Immanuel Kant
He made every person priceless and unusable as a means — then printed a ranking of the human races and refused to lie to a murderer at the door.
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This Lens is an independent AI interpretation and is not affiliated with, approved by or endorsed by David Hume, their estate, family or representatives.How lenses are built →