A gap or missing portion in a manuscript or text caused by physical damage, erasure, loss, excision, or omission, resulting in absent words, lines, leaves, or passages that interrupt the textual continuum.

Principle

A lacuna removes direct textual evidence for some locus; reliable reconstruction therefore depends on other witnesses, contextual inference, or explicit editorial conjecture, and always carries uncertainty.

Demonstration

Illustrative scenario → A folio of a codex is lost leaving a three-line lacuna in a narrative. An editor reconstructs the missing lines by comparing parallel manuscripts and by citing the lacuna explicitly in the apparatus, marking uncertain conjectures as such.

Misapplication

Assuming that every lacuna indicates deliberate authorial omission or censorship. The error is to conflate physical absence with authorial intention; many lacunae result from accidental loss or later damage.

Consequence

Lacunae necessitate editorial intervention (conjecture, supplied text, or gap marking), increase uncertainty in interpretation, and limit claims about the author's exact wording at the lacunose locus.

Reversal

Advances in imaging (multispectral analysis, palimpsest reading) or discovery of additional witnesses can recover text formerly considered lacunose; conversely, some lacunae are intentional blanks and should be treated as part of the text's material history.

Boundary

Clearly within: a physical hole or missing folio producing absent lines. Boundary case: heavily faded text legible only with imaging. Clearly outside: a variant reading or an editor's omission in an edition that leaves the exemplar intact.

Semantic Tension

Tension between the desire for a complete, readable text and the obligation to preserve and signal uncertainty about what is not attested; editors balance completeness against evidential transparency.

Synthesis

A lacuna is a limit-case of evidential absence that requires explicit editorial strategy: either preserve the gap transparently or supply conjecture with clear qualification, because reconstruction without disclosure misrepresents textual certainty.