. . . . "The FAO cephalopod identification sheet was downloaded and converted with pdftotext. The block beginning at the English name Common octopus was searched for the hectocotylus, the arm number, and the tip shape. Arm III fails the 'last arm' clause under the pre-registered mapping of 'last' to arm IV. A spoon-shaped ligula without fork language fails the tip clause. Colour and sharpness were recorded only when the same block stated them." . . "Measured: 3 FAO arm number of the hectocotylus (n = 1). Interpretation: Aristotle's octopus is Octopus vulgaris. 'The last feeler' is mapped to the ventral arm, FAO arm IV, not to whichever arm a counter happens to list last. A hectocotylus shows that some arm is specialized for copulation; the claim also fixes which arm and the shape of its tip. Colour and sharpness are scored only when the sheet speaks to them." . "Claim test of aristotle-ha04-02: refutes, confidence 0.8" . . . "A public taxonomic description of Octopus vulgaris, the common octopus of the Mediterranean, that states which arm is modified for copulation and the shape of its tip." . "claim-test/0.1.0" . "biological" . "The copulatory arm is the third arm, or its tip is a spoon-shaped ligula rather than a fork." . "Arm I dorsal to arm IV ventral is the FAO numbering, adopted before the sheet was read. Aristotle did not number arms this way." . "No licence line was extracted from the PDF text." . "The sheet is a taxonomic diagnosis, not a count of males. One description stands for the species." . "Whitish colour and sharpness are not in the Octopus vulgaris diagnostic block, so those adjectives are untested." . "The diagnostic text says the male copulatory arm is the ventral or fourth arm and that its tip is forked." . "Pre-registered. Refutes if the copulatory arm is identified as arm III, the third arm, or any arm other than IV, or if the tip is described as a spoon or a ligula and is not also described as forked. Mixed if the sheet states a hectocotylus but names neither the arm nor the tip shape, or if fork language and spoon language both occur. Inconclusive, reason data-unavailable, if the sheet has no hectocotylus statement for Octopus vulgaris. Confidence 0.80 on a refute. Arm numbering is the FAO convention: arm I is dorsal and arm IV is ventral, and 'last' is arm IV." . "0.8"^^ . . "refutes" . "If the claim holds, the male common octopus, Octopus vulgaris, copulates with its last arm, and that arm ends in a sharp, whitish fork." . "Extract the Octopus vulgaris diagnostic paragraph and match arm number and tip shape against the pre-registered phrases. The claim is a conjunction of arm identity and tip shape." . "Pre-registered. Supports only if both scored clauses pass in the FAO species-sheet text for Octopus vulgaris. Arm clause passes if the hectocotylized (copulatory) arm is the last arm: arm IV, the fourth arm, or the ventral arm. Tip clause passes if that arm's tip is described as forked, bifurcate, bifid or split. Whitish colour and sharpness are recorded when the sheet states them and are not required for support, because a sheet that is silent on colour is not a denial. Confidence 0.82 on support." . "false"^^ . . "diagnostic statement of which arm is hectocotylized and the shape of its tip" . "" . . "Dataset: FAO species identification sheet, Octopus vulgaris (ac479e)" . . . "sha256:17be4fa63485ea5e0a552ace82ac155e4e03e59457aee205a53b05d82bc7f80f" . . "delphisci claim tester (grok-4.7; cursor/aristotle-biology-tests-0ae4)" . . . "grok-4.7" . . . . . . . . . "2026-11-08T16:24:31.756Z"^^ . . . . . "Claim test of aristotle-ha04-02: refutes, confidence 0.8" . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB" . "OAlknAn9ot39bpQK2N29B22El4ohH0JSgO/nD0wrz9Z0ELtqKYpltskOlC03rgiOLD+oHe7k86xL6l8oTy0E2qX+ydtQ/inuEYSotYEh2/jIbS/3SZ+8NQRZxFV3vSMGc32ajI0WFD7eaBG6V4pXNAPoqGNZUP80ul/co9eHFUDobzi4oDQWLzhxc7fm5B0iLc33QY1kDMe8Yir9L2nLFK2TjCOPXMOx/itr1qrTTIbj8y7aUD5FU2Yb4kYYRvQcGIOR5Xh8vzQUikfOlqzVjUPVQzhsKDAPFCmiycJBB+bO8MyhupDmc0vGyamrXU6aDysoHXb3SnYgyFNsIjCw2Q==" . . .