A Fregean structure for assertions

The following is a study on a class of colloquial constructions from Iberian Spanish and English which seem to be related to what I will loosely call a domain of assertion. The picture that arise from a scrutiny of those constructions is that the structure of declarative clauses must be more complex than it is standardly assumed. The claim is that it is more complex in the sense that it involves features which are typically assumed in a Fregean analysis of statements as claims to truth : declarative clauses involve a feature of assertion and something close to a truth-predicate or an evaluative element. The assertion domain will be shown to have a clausal structure, very much in the line of Ross's proposal of the seventies, the so-called performative hypothesis