The truthful statement is the assertive speech act under a fulfilled sincerity condition: the speaker holds what is asserted to be true and expresses this conviction in speaking. It is the basic form of every serious act of asserting and is constitutive of dialogue, science, and discursive capacity.
Searle’s Definition
John R. Searle (Speech Acts, 1969) determines four conditions of the assertive speech act:
- Propositional content: a state of affairs p is expressed.
- Preparatory condition: the speaker has reasons for p.
- Sincerity condition: the speaker believes that p.
- Essential condition: the utterance counts as undertaking the commitment that p is true.
If an utterance fulfills all four conditions, it is a truthful statement. If it violates the sincerity condition (the speaker does not believe that p, yet asserts p), it is a lie. If the sincerity condition structurally cannot be fulfilled (no speaker with belief), the utterance is AI truth-indifferent.
Three Categorially Distinct Modes
| Mode | Sincerity condition | Bearer |
|---|---|---|
| Truthful statement | fulfilled | person with belief in p |
| Lie | violated | person without belief in p, asserts p |
| Truth-indifferent utterance | structurally unfulfillable | no speaker with belief |
These three modes are categorially distinct — they differ not in degree. A truth-indifferent utterance does not become a truthful statement through scaling; a lie does not become truthful by being repeated frequently.
Presupposition: Truthfulness as a Virtue
Truthful statements are not accidentally true but the outflow of personal truthfulness — the habitual disposition toward a relation to truth (Hildebrand, Christian Ethics, 1953). A person who is truthful typically makes truthful statements; she can lie, yet does not, because she does not will to.
An entity that cannot be truthful — one structurally lacking the habitual disposition — makes no truthful statements, but at most accidentally correct ones (cf. the ontological difference of LLM output).
Ontological Classification
- is a subclass of: genuine speech act, specifically of the assertive form
- requires: truthfulness of the speaker, original intentionality
- essentially different from: AI truth-indifferent utterance and (through a different violation) the lie
- constitutive of: dialogue, science, discursive capacity
Sources: Generated by querying the Personhood ontology.
Further sources:
- Searle, John R. (1969): Speech Acts. Cambridge: Cambridge University Press.
- Searle, John R. (1979): Expression and Meaning. Cambridge: Cambridge University Press.
- Hildebrand, Dietrich von (1953): Christian Ethics. New York: David McKay.
- Spaemann, Robert (1996): Persons: The Difference between ‘Someone’ and ‘Something’. Transl. Oliver O’Donovan. Oxford: Oxford University Press, 2006.
- Habermas, Jürgen (1981): Theorie des kommunikativen Handelns. Frankfurt am Main: Suhrkamp (German).