2019-20 One and One

• G-001 Task-prompt sweep cited a release date of 2020-07-15 "per tcdb", but a direct fetch of the tcdb product page and two other independent sources (cardboardconnection, checklistcenter) all state November 25, 2020 (with checklistcenter noting the product was "originally scheduled for September but will now arrive November 25"); a Steel City Collectibles retailer listing likewise shows "released 11/25/20" against UPC 613297961291. Panini's own blog preview article states a September 23, 2020 target, consistent with the pre-delay date. Used 2020-11-25 (3-source agreement including tcdb itself) over the sweep's 2020-07-15, which could not be corroborated anywhere.
• G-002 Base set size trap: cardboardconnection, checklistcenter, tcdb, and Panini's own first-party blog preview all describe the product as a "180-card" base set. Card-level evidence shows cards 151-180 are a separately-headed "Legends" subset of retired players (per checklistcenter's explicit subheading and a matching RC/non-RC content break at 100/101 and 150/151 confirmed via tcdb). Resolved base_set_size to 150 and recorded Legends as its own insert-type set, per the task's explicit base_set_size-inflation warning.
• G-003 Downtown insert card count: Panini's own blog preview states Downtown features "25 of the top current players", but tcdb's full card-level checklist enumerates exactly 20 cards, independently matched in prose ("20 cards") by both cardboardconnection and checklistcenter. Used 20 (2-source card-level agreement) over Panini's single-source prose figure of 25.
• G-004 Jersey Autographs and Dual Jersey Autographs card counts disagree between sources: cardboardconnection reports 20 cards for each; checklistcenter reports 19 cards for each. Could not obtain a card-level checklist to resolve (tcdb's own checklist pages for these exact set names could not be located, only their color-parallel sub-pages). Recorded cardboardconnection's figure of 20 in sets.csv with this disagreement flagged; true count is unverified.
• G-005 team_or_school values for base_cards.csv were sourced primarily from checklistcenter (the only source that published team names alongside every card number across the full 1-150 range); cardboardconnection independently duplicated the 82-100 range verbatim (multi-source for that slice only). Player names and card numbers for the rest of the range were separately cross-checked against tcdb's own checklist pages (1-81 and 101-150), but tcdb's own pages did not display team names, so the team column itself is effectively single-source outside cards 82-100.
• G-006 No manufacturer-published numeric pull-rate odds (e.g. "1:X packs" or "1 per case") could be found anywhere for this product/season, consistent with the task prompt's note that Panini publishes no numeric basketball odds. The only quantitative box-level statement found ("1 autograph... per box, on average" / "Find 1 autograph and 1 base, parallel or insert card per box") is a box-average guarantee, not a pull rate, and per the scarcity-pass hard rules was not tiered. As a result scarcity_sets.csv and scarcity_parallels.csv contain header rows only, and ssp_cards.csv is empty -- see final report for detail, including why Downtown (marketplace-labeled "SSP" on eBay only) was deliberately not tiered.
• G-007 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-008 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-009 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-010 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-011 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-012 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-013 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-014 1 insert/auto set(s) in this release are documented as carrying their own parallel tier, but no source enumerated the colours, so no scoped parallel rows could be created. The tier exists; its members are unknown.
• G-015 Jersey Autographs and Dual Jersey Autographs: 19 card numbers written against a sets.csv card_count of 20 for each. The 20th card of each set could not be identified and is therefore NOT written. Evidence: tcdb's base pages (https://www.tcdb.com/Checklist.cfm/sid/252189/2019-20-Panini-One-and-One---Jersey-Autographs and https://www.tcdb.com/Checklist.cfm/sid/252196/2019-20-Panini-One-and-One---Dual-Jersey-Autographs) each render 19 rows with a "Total Cards 19" header, and the parallel-page union test was run in full on Jersey Autographs -- all six tiers (Blue sid 252190 = 9 rows, Purple 252191 = 9, Red 252192 = 10, Gold 252193 = 17, Green 252194 = 17, Black 252195 = 19) yield exactly the same 19 codes and contribute no 20th player; Dual Jersey Autographs Black (sid 252202) likewise renders a complete 19. So the shortfall is NOT tcdb base-page truncation -- every tier agrees at 19. This is the unresolved count already recorded as G-004: cardboardconnection reports 20 (the figure sets.csv carries) while checklistcenter reports 19; tcdb's card-level evidence now sides with checklistcenter at 19. Because tcdb and checklistcenter may share an upstream, this is not treated as settling G-004 -- sets.csv was left untouched at 20 and the 19 sourced rows were written. No player is withheld here: the missing 20th card has no known identity in any source reached, so there is no name to record.
• G-016 Single-source reliance: 7 of the 10 sets in this release rest on a single tcdb page for their card numbers, with no second independent source found for the full roster -- Legends (parent sid 239919 PageIndex=2), Downtown (sid 252248), First-Team Signatures (sid 252203), Premium Rookie Jersey Autographs (sid 252210), Rookie Autographs (sid 252217), Rookie Jersey Autographs (sid 252226), Rookie Dual Jersey Autographs (sid 252234). Partial independent corroboration was obtained at the CARD level for three of the numbering schemes but not for whole rosters: Downtown #2 LeBron James via https://goldin.co/item/2019-panini-one-and-one-downtown-2-lebron-james-psa-gem-mt-10jggi9 , TM-TYG via a goldin lot, and DJA-LMK via a free-text eBay seller title. Jersey Autographs and Dual Jersey Autographs additionally have tcdb parallel-tier corroboration. Legends rests on the tcdb parent checklist alone and is the weakest-sourced set here: it has no subset sid, no parallel page of its own, and no marketplace title was found carrying a 151-180 number against the "Legends" name. Every non-tcdb aggregator that covers this release (cardboardconnection, checklistcenter, breakninja, groupbreakchecklists) was treated as roster-only per spec and supplied no card_number.
• G-017 Cross-season prefix contamination hazard for this product line, logged for later passes and sibling seasons. An eBay catalogue page (https://www.ebay.com/p/27091893253) is titled "2019-20 Panini One and One - Dual Jersey Autographs 2024-25 Panini One and One Update Pascal Siakam #DJA-PSK /99 (AU, MEM)" -- a 2024-25 One and One UPDATE card carrying this release's DJA- prefix while filed under the 2019-20 set name. Pascal Siakam is not in the 2019-20 Dual Jersey Autographs checklist and was correctly excluded; no Update card was written into this release. The DJA-/JA-/RJA-/RA-/TM-/FT-/PRJA-/RDJA- prefixes are therefore NOT safe keys across seasons of this line. Recorded also because the page carries tcdb flag strings "(AU, MEM)", confirming eBay /p/ pages are aggregator-seeded on this product.

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