 Bolzano maintains that there are truths that have no grounds, citing the example [There is something]=[[Something] has objectuality] (TS, § 214). He calls them basic truths (Grundwahrheiten). He thinks that there must be more than one basic truth, “for I cannot understand how from a single truth all others would follow either as consequences, or consequences of consequences, etc.” (§215). As in the Contributions, Bolzano emphasizes that this is not an epistemic notion: in particular, basic truths need not be evident, and may require proof in the sense of a certification.