{"action":"opened","issue":{"url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/245","labels_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/245/labels{/name}","comments_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/245/comments","events_url":"https://api.github.com/repos/HOL-Theorem-Prover/HOL/issues/245/events","html_url":"https://github.com/HOL-Theorem-Prover/HOL/issues/245","id":62546670,"number":245,"title":"Inconsistent description of `Induct_on`","user":{"login":"ptroja","id":161602,"avatar_url":"https://avatars.githubusercontent.com/u/161602?v=3","gravatar_id":"","url":"https://api.github.com/users/ptroja","html_url":"https://github.com/ptroja","followers_url":"https://api.github.com/users/ptroja/followers","following_url":"https://api.github.com/users/ptroja/following{/other_user}","gists_url":"https://api.github.com/users/ptroja/gists{/gist_id}","starred_url":"https://api.github.com/users/ptroja/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ptroja/subscriptions","organizations_url":"https://api.github.com/users/ptroja/orgs","repos_url":"https://api.github.com/users/ptroja/repos","events_url":"https://api.github.com/users/ptroja/events{/privacy}","received_events_url":"https://api.github.com/users/ptroja/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-03-18T00:04:20Z","updated_at":"2015-03-18T00:04:20Z","closed_at":null,"body":"The _DESCRIPTION_, paragraph _Strong Induction Principles_, says that ```Induct_on``` uses the strong induction principle, which for relation ```R``` is stored in the ```R_strongind``` theorem. But section _Proofs with Inductive Relations_ (just 2 pages later) says that ```Induct_on``` is a \"slightly more high-level approach [to ```HO_MATCH_MP_TAC R_ind```]\", which relies on another induction principle, which is stored in ```R_ind``` theorem."}}