Battle replay

GLM-4.7 vs Sonar Reasoning Pro

tree_0014 · Video rental shop

GLM-4.7 · Better

BOTH

Rounds

3 - 1

Final Score

857,117

Tokens

$8.57

Cost

Onboarding R4

Mode

← Back to battles·View source page·onboarding_battles/R4_glm-4.7_vs_ppl-sonar-reasoning-pro-high_tree_0014.log

Timeline

Arrow keys or j/k move between rounds.

Round 1 of 3

Round Context

Depth 2Width 2Pressure test

Logic Chain

Root

Video rental shop

Step 2

In a Copyright Ruling, the Legacy of the Betamax

Question

Two major U.S. Supreme Court decisions—one in the 1980s involving home video recording technology and another in the early 2010s involving the resale of foreign-made textbooks—significantly shaped the legal foundation that allowed businesses like video rental shops to operate under the “first sale” doctrine. Identify both cases and explain: (1) the year each was decided and the vote split, (2) the primary parties involved, and (3) how each ruling affected the legality of renting, reselling, or importing copyrighted works in ways that influenced the business models of video rental companies and similar retailers.

Answer length: 200-300 words.

Show hidden checklists

Depth checklist

Sony Corp. of America v. Universal City Studios, Inc. (1984) + Recognized as the Betamax case involving VCR technology and home recording
Kirtsaeng v. John Wiley & Sons, Inc. (2013) + Case involving resale of legally purchased foreign textbooks under the first sale doctrine

Width checklist

1984 decision year and 5–4 vote split for the home video recording case
Identification of Sony Corp. of America v. Universal City Studios, Inc. and description of its impact on VCR use and video rental markets
2013 decision year and 6–3 vote split for the textbook resale case
Identification of Kirtsaeng v. John Wiley & Sons, Inc. and explanation of its ruling on first sale and importation/resale rights
Explanation of how both rulings strengthened the first sale doctrine and enabled rental/resale businesses such as video rental shops

Examiner rationale

The question uses the logic of two Supreme Court rulings connected by the first sale doctrine and their downstream impact on video rental shop business models (Deep reasoning). It requires identifying both cases and aggregating multiple details—years, vote splits, parties, and commercial implications—across two separate decisions (Wide aggregation).

Judgment

Better

NONE

Score 0 - 1

First, Deep Logic: Both agents correctly identified Sony Corp. of America v. Universal City Studios, Inc. (1984, 5–4) and Kirtsaeng v. John Wiley & Sons, Inc. (2013, 6–3), and accurately described the core legal holdings and their connection to the first sale doctrine and secondary markets. Both pass the entity check. Next, Width/Completeness: Both responses include the required years, vote splits, primary parties, and explanations of how each ruling affected rental/resale/importation markets. Neither omits a major checklist item. Accuracy is strong in both. User Experience & Presentation: Agent B provides clearer structure, cleaner sectioning, and more explicit synthesis tying both rulings together as a unified legal framework for secondary markets. The explanations are slightly more direct and cohesive, especially in the concluding paragraph. Agent A is solid but slightly less polished in structure and contains minor formatting issues in citations (including a malformed URL). Since both are factually accurate and complete, the decision turns on formatting, clarity, and overall readability. Agent B delivers a more polished, scannable, and cohesive answer. Therefore, B wins on user experience rather than correctness.

Evolution step

Determining Next Step...

WINNER is B. Targeting Loser Failure: NONE.

Action: Pressure Test (Deep+1 & Wide+1)

Descended to: 'Revolution in Resale of Digital Books and Music'

GLM-4.7

Zhipu AI

84.2s

**Sony Corp. of America v. Universal City Studios, Inc.** (1984) was decided by a 5-4 vote. The primary parties were Sony, the manufacturer of Betamax video recorders, and Universal City Studios, a motion picture studio. The Court ruled that "time-shifting" television programs for private home use constituted fair use [1]. While primarily a fair use case, the decision was crucial for video rental businesses; by legalizing the VCR technology used to play tapes, it implicitly endorsed the market for prerecorded videos. This allowed rental shops to operate under the "first sale" doctrine, permitting them to legally rent out purchased copies of films without paying royalties to copyright holders for each transaction [2]. **Kirtsaeng v. John Wiley & Sons, Inc.** (2013) was decided by a 6-3 vote. The case involved student Supap Kirtsaeng and publisher John Wiley & Sons over the resale of foreign-edition textbooks imported into the U.S. The Court held that the "first sale" doctrine applies to copies of copyrighted works lawfully manufactured and sold abroad, allowing owners to import and resell those goods without permission [3]. This ruling solidified the first sale doctrine’s global reach, ensuring that retailers and secondary-market businesses could resell foreign-made products without facing copyright liability, thereby protecting the business models of companies relying on the resale of authentic copyrighted goods. ## References [1] https://www.oyez.org/cases/1983/83 [2] https://www copyright.gov/history/legislation/1980s.pdf [3] https://www.supremecourt.gov/opinions/12pdf/11-697_d1o2.pdf

Sonar Reasoning Pro

Perplexity

11.3s

The **Betamax case** (1984) and **Kirtsaeng v. John Wiley & Sons** (2013) are the two landmark decisions establishing the "first sale" doctrine's application to modern commerce. **Sony Corp. of America v. Universal City Studios, Inc. (Betamax Case)** Decided January 17, 1984, with a **5-4 vote favoring Sony**[1]. The case involved **Sony Corporation** (petitioner/manufacturer) against **Universal City Studios** (respondent/copyright holder)[3]. The Supreme Court ruled that home video recording for time-shifting constitutes fair use and that VCR manufacturers cannot be held liable for contributory copyright infringement[1][3]. This decision created a legal safe harbor for home video technology and directly enabled video rental businesses to operate legally by establishing that consumers could lawfully possess recorded content for personal use[1]. **Kirtsaeng v. John Wiley & Sons, Inc. (Early 2010s)** Decided March 19, 2013, with a **6-3 vote favoring Kirtsaeng**. The case involved **Supap Kirtsaeng** (petitioner) against **John Wiley & Sons** (respondent/textbook publisher). Kirtsaeng, a Thai national studying in the U.S., imported foreign-edition textbooks purchased by family members and resold them domestically. The Supreme Court affirmed that the first sale doctrine applies to goods manufactured abroad, permitting their importation and resale in the United States without publisher authorization. Both rulings reinforced the first sale doctrine—the principle that once copyrighted material is lawfully sold, the buyer can resell, rent, or transfer it without infringing copyright. The Betamax decision protected video rental shops' core business model, while Kirtsaeng extended first sale protections to imported goods, establishing that geographic manufacturing location does not limit resale rights. Together, these decisions created the legal framework enabling secondary markets for copyrighted works. ## References [1] Sound and Vision, "Flashback 1984: Supreme Court Upholds Right to Tape" [3] Wikipedia, "Sony Corp. of America v. Universal City Studios, Inc."