@prefix this: . @prefix sub: . @prefix np: . @prefix rdf: . @prefix prov: . @prefix npx: . @prefix dc: . @prefix xsd: . sub:Head { this: a np:Nanopublication; np:hasAssertion sub:assertion; np:hasProvenance sub:provenance; np:hasPublicationInfo sub:pubinfo . } sub:assertion { a ; dc:description "Downloaded the thesis PDF, checked its size and md5 against the repository record, and read Tables 1, 5 and 8 (pole blastomere contacts) by word coordinates. For each 4-cell row, a percentage is the value in that column and a blank is zero. Nearest-integer counts are percent times n. Where the polar-furrow columns sum to about 100 percent, every embryo is in full contact and an X-furrow column counts an embryo that also meets at a point at the other pole. Where only one contact type is filled, the rest of the row are openings and are excluded. The pre-registered fractions are applied to the pooled full-contact embryos."; "Measured: 0.25 fraction of full-contact 4-cell embryos with an X-furrow (n = 20, counts are nearest integers of the table percentages times n; see extra.unrounded). Interpretation: Thompson's claim is about the four-celled stage of a segmenting egg whose cells are in full fluid contact: the four cells cannot meet in one point, a short intermediate partition (the polar furrow) must be present, and drawings of a simple cross are error or imperfect observation. He allows the furrow to be very short. A central hole, where the four cells do not touch, is not full contact and is not counted as a counterexample. The claim is universal across such eggs; one phoronid study can refute it if four-way junctions are common, and can support it only for the animals actually scored. Tetrahedral four-cell packings that are not a planar junction at the pole are outside the planar cross he discusses and are not recoded."; "Claim test of thompson1917-ch07-05: refutes, confidence 0.45"; ; prov:wasAttributedTo ; "A public count, from embryos rather than from a simulation, of four-cell stages scored for a polar furrow versus a four-way junction, in animals whose blastomeres can sit in one plane in fluid contact. Embryos the source describes as having a persistent central opening are outside the claim's full-contact scope and do not enter the denominator. Login-walled image stacks are not used."; "claim-test/0.1.0"; "biological"; "At least 25 percent of full-contact four-cell embryos meet in a four-way cross."; "One phoronid genus is not every animal egg the claim names.", "Openings, where the four cells do not touch, are outside the claim's full-contact scope and are not counted as crosses.", "Percentages were already rounded in the thesis, so a count can be off by about one embryo. The unrounded X total is stored beside the rounded one.", "The PDF md5 matches the repository record.", "The author notes that a very small opening is difficult to tell from an X-furrow, so some X calls may be openings.", "X-furrows in these tables come from fixed embryos. The 4D-recorded rows of P. pallida and P. muelleri show polar furrows or openings and no X-furrow."; "Among four-cell embryos in full contact at the pole, a polar furrow is present in at least 90 percent and a four-way cross in at most 10 percent."; "Pre-registered (refutes). n_in_scope >= 20 and the X-furrow fraction >= 0.25. If n_in_scope >= 20 but neither the support rule nor the refute rule holds, the verdict is mixed. If a scoring table is found but n_in_scope < 20, the verdict is inconclusive with reason underpowered. If the public text does not yield machine-readable counts of polar furrows and four-way junctions, the verdict is inconclusive with reason data-unavailable. Figures are not scored by eye."; "0.45"^^xsd:double; ; "refutes"; "At the four-cell stage, embryos whose blastomeres are in full contact at the pole show a polar furrow (a short contact between one pair of opposite cells) and do not meet four-at-a-point in a stable cross."; "Pooled fraction of polar furrows and of four-way junctions among full-contact embryos, with the thresholds in pass_criterion and fail_criterion, plus a per-species split that forces mixed when species with n >= 10 disagree across those thresholds."; "Pre-registered (supports). From embryo counts scored by the source as polar furrow or as a four-way junction (X-furrow / simple cross), with a central opening or gap treated as not in full contact and excluded from the denominator: n_in_scope >= 20, the polar-furrow fraction >= 0.90, and the X-furrow fraction <= 0.10. If two or more species each have n >= 10 and at least one of those species meets the refute thresholds below while another meets these support thresholds, the verdict is mixed even if the pooled counts support."; "false"^^xsd:boolean . . a ; dc:description "scored 4-cell polar furrows and X-furrows in three Phoronis species"; dc:license "CC BY-NC-ND 3.0 DE"; "Dataset: Cleavage and cell fates in Phoronida (Pennerstorfer 2015), doctoral thesis"; prov:atLocation ; prov:wasDerivedFrom ; "sha256:72987207736c7e5ca6855bedccc635c2cc9c1dbcb7cf80b27eec57705cf051ac" . } sub:provenance { a prov:SoftwareAgent; "delphisci claim tester (Grok 4.7; cursor/thompson-ch14-to-ch11-tests-48d7)"; prov:actedOnBehalfOf ; . a ; dc:identifier "Grok 4.7" . sub:assertion prov:wasAttributedTo ; prov:wasDerivedFrom ; prov:wasGeneratedBy sub:test . sub:plan prov:hadPlan . sub:test a prov:Activity; prov:qualifiedAssociation sub:plan; prov:wasAssociatedWith . } sub:pubinfo { this: dc:created "2026-11-08T16:24:31.900Z"^^xsd:dateTime; dc:creator ; dc:license ; npx:hasNanopubType ; npx:introduces ; "Claim test of thompson1917-ch07-05: refutes, confidence 0.45"; . sub:sig npx:hasAlgorithm "RSA"; npx:hasPublicKey "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB"; npx:hasSignature "AJH3vP/q+mcrsFflOqLXYlXOSWbPkYBYT2CDcnQaCfUKspzF0Xk3mItckqkmittts6lIvtIM7Ih4VqbZwhkQtTW7tad165q48giYF52CSwhNug1q+jLNQREFN7JlmjBl7c0jt7dt09FFZOdcO9kCtFY+Akb4XrrLANsMRmBWiJrUsDgcId62k6/OBP1+HVaXSKmc1BkTNDb1rwK7k46wplt/jGA+KHAd+fSItLXdkSU2NJ0x4mkg3jrMA8xocXjduV7YnCSdjbN+lMYqLF4udjr7M/XLYwUcpdr5CX0O7y+gepvDF/dgdVn4NV79V5zOaeo3YEFNzo8jsFAuR7bv9w=="; npx:hasSignatureTarget this:; npx:signedBy . }