Book · 1953
Philosophical Investigations
by Ludwig Wittgenstein
Wittgenstein's public recantation of his own first masterpiece, dismantling the picture theory of meaning one language-game at a time.
What does Reddit think of Philosophical Investigations?
This is a professional reading list staple, not a casual discovery. The book appears almost exclusively in the frame of contrast: r/askphilosophy commenters reliably invoke it when distinguishing early Wittgenstein from late Wittgenstein, treating the Tractatus-to-Investigations reversal as a teaching device in itself. The ↑148 comment on Wittgenstein's Cambridge return is the canonical summary the sub reaches for. The ↑83 comment captures the drama more cleanly: a philosopher who declared the problems of philosophy solved, then returned to show he was wrong. The language-game concept gets cited when someone misuses it (↑78), not to praise the book. The ↑149 comment on defining terms treats Philosophical Investigations as citation rather than endorsement. Mention counts held above 13 annually from 2019 through 2022, dipped to 5 in 2023, then recovered to 17 in 2024 and 16 in 2025.
Community feedback & reader fit
Themes
- · Language-games and meaning as use
- · The repudiation of the Tractatus picture theory
- · Private language argument
- · Rule-following and skepticism
- · Ordinary language philosophy
- · Context-dependence of speech acts
Common praise
- + The language-game framework gives r/askphilosophy a shorthand that survives decades of analytic philosophy debates.
- + The early-vs-late Wittgenstein contrast (↑148) functions as one of r/askphilosophy's most reused pedagogical moves.
- + The argument against univocal definitions (↑149) gets pulled out every time someone demands a single clean answer to a conceptual question.
- + 100 out of 108 mentions happen on r/askphilosophy, which means working philosophers consider this the primary reference text, not an introductory curiosity.
Common criticism
- − Neither subreddit produces a single highly-upvoted comment that recommends reading it cover to cover for pleasure.
- − The ↑78 comment exists specifically to correct a misuse of 'language-game', suggesting the book's core concepts get mangled in transit.
- − Mention volume dropped to 5 in 2023 before recovering — a dip that coincides with no obvious external cause.
- − r/philosophy, the larger general sub, contributes only 8 mentions across 7 years, implying the book's reputation is narrower than its fame suggests.
Who it's for
Read this if r/askphilosophy is already part of your browser history and you've encountered 'language-game' misused one time too many. It rewards people who finished the Tractatus and felt the edifice was too neat. Graduate students in analytic philosophy will find 100 of Reddit's 108 references to this book living in their professional home sub — that's not an accident. If your interest is continental philosophy or you want Wittgenstein as an entry point to philosophy generally, the reception data suggests you'll find r/askphilosophy treating this as background assumption rather than introduction.
Mentions over time
Top subreddits
Which Reddit comments matter for Philosophical Investigations?
Top-upvoted quotes across the subreddits where this book is mentioned. Click through to read the full thread.
“> It’s hard to define anything in the end tbh. If you pretend that we have to offer one univocal definition for all times and people, then, yes, it is difficult to nail down one specific definition. Luckily, we do not need to do that. See Wittgenstein, [Philosophical Investigations](
“This video looks at one of Ludwig Wittgenstein's ideas from his most important work Philosophical Investigations, and contrasts it to the philosophical method of Socrates, in reaction to which Wittgenstein described his philosophy as "the opposite of Socrates'". It does so through an examination of …
“Wittgenstein basically changed the face of Analytic philosophy for fifty years with the publishing of the *Tractatus*, which was a massive and substantial inspiration for the Logical Positivists. Wittgenstein later came to reject the doctrines of the *Tractatus* when he returned to philosophy at Cam…
“Wittgenstein's philosophy is generally discussed in terms of 'early Wittgenstein' or 'late Wittgenstein' to distinguish between his views in the *Tractatus Logic-Philosophicus* and *Philosophical Investigations*, respectively. Wittgenstein abandons some significant aspects of his view from the *Trac…
“Probably not! There is no foolproof abstract way, out of context, to determine whether a given speech act is an assertion; if it is an assertion, what it asserts; etc. A significant amount of speech depends on the context in which speech is uttered, the presumed intentions of the speaker, the pres…
“The most notable in my mind is Wittgenstein who thought he was completely done with philosophy after the Tractatus and years later came back essentially denouncing his previous work and writing "Philosophical Investigations"
“You're in the thrall the early Wittegenstein. The cure is the later Wittgenstein. Read the Philosophical Investigations; it's the standard critique of the theory of language and reference that you're trapped by.
“Philosophers seldom change their mind about anything as much as Wittgenstein did about language. The shift from his early masterpiece, the Tractatus Logico-Philosophicus, to his later work, Philosophical Investigations, is as radical as the move from modern to post-modern philosophy, argues Lee Brav…
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Readers also mention
Books that share discussion threads with Philosophical Investigations — counted from the comments, not curated.
Tractatus Logico-Philosophicus
Ludwig Wittgenstein
Wittgenstein built a numbered ladder from logical atomism to the inexpressible, then said the ladder had to be discarded once you climbed it.
The Problems of Philosophy
Bertrand Russell
Bertrand Russell wrote a 90-page intro to analytic philosophy in 1912 and r/askphilosophy still hands it to newcomers first, every time.
Being and Time
Martin Heidegger
Heidegger's argument that human existence only gets its meaning from death — 162 Reddit mentions, mostly from people explaining why it's so hard to read.
Philosophical Investigations — frequently asked
What does Reddit actually use Philosophical Investigations for?+
Mostly as a citation weapon. r/askphilosophy reaches for it in two situations: correcting someone who demands a single definition for a contested concept (↑149), and explaining the early-vs-late Wittgenstein split (↑148, ↑113). It's cited to settle arguments, not to be recommended. 100 of 108 total mentions come from that one sub across 7 years.
Should I read Philosophical Investigations before or after the Tractatus?+
After, according to how r/askphilosophy structures the conversation. The ↑148 comment explains Wittgenstein's Cambridge return and rejection of Tractatus doctrines as essential context. Without the earlier book, the repudiation loses its force. The sub treats the sequence as a two-part story, not two independent texts.
Is Philosophical Investigations actually read on Reddit, or just cited?+
Mostly cited. They read like footnotes. The book functions as authoritative reference rather than an object of enthusiasm.
Why does Philosophical Investigations barely appear in r/philosophy despite 108 total mentions?+
Eight mentions in seven years. r/philosophy skews toward accessible explainers and current events; the ↑149 video post there contrasts Wittgenstein with Socrates at an introductory level. The technical, remark-by-remark structure of the book fits r/askphilosophy's question-and-answer format far better than r/philosophy's broader audience.