verisimilar
Appearing to be true or real; probable; likely.
Joyce's objection was founded in [...] a reaction to the doggedly linear, heavily patterned artifice of the nineteenth-century novel, the verisimilar credentials of which existed – so, at any rate, the argument runs – in inverse proportion to the conventionality of its narrative style.
Faithful to its own rules; internally consistent.
Where it comes from
From Latin vērisimilis, prop. vērī similis (“having the appearance of truth”), from vērī (genitive of vērus (“true”)) + similis (“like, similar”); see very and similar.
Adapted from the Wiktionary entry verisimilar (CC BY-SA 4.0).