#counterexample
Live, measured metrics for the hashtag #counterexample from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #counterexample
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-19 01:51 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mastodon.social (Mastodon public search API) · fetched 2026-10-19 01:51 UTCLive pulse
measured · mastodon.social (Mastodon tag timeline) · fetched 2026-10-19 01:51 UTCEverything below is measured over the latest 11 public posts (spanning ~41876 hours).
Posting hours (UTC)
Languages: English (10)
Avg boosts / post: 1.5
Top of the latest posts
Apparently somebody posted a #counterexample to the Jacobian conjecture on X last night (found by an LLM). I won’t link that junk site, but somebody added it to Wikipedia already if you care: https://en.wikipedia.org/wiki/Jacobian_conjectur
"The result demonstrates that “the unknotting number is chaotic and unpredictable and really exciting to study,” she added. The paper is “like waving a flag that says, we don’t understand this.”" https://www.quantamagazine.org/a-simple-way-
RE: https://mastodonapp.uk/@brainsmatter/116643574474947035 #Erdős #PlanarUnitDistanceProblem #proof #conjecture #counterexample #maths
What “counterexample” means
Wiktionary · Wikipediacounterexample
- nounAn exception to a proposed general rule; a specific instance of the falsity of a universally quantified statement.
A counterexample is a specific example that contradicts a claim, hypothesis, or generalization. In logic a counterexample disproves a universally stated claim, and does so rigorously in the fields of mathematics and philosophy. For example, the statement that "student John Smith is not lazy" is a counterexample to the generalization "students are lazy", and both a counterexample to, and disproof of, the universally quantified "all students are lazy."
“Counterexample” on Wikipedia (CC BY-SA) →#counterexample across platforms
every network with a public tag surfaceFollow #counterexample straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/counterexample