Last updated11 Apr 2026, 3:22 pm SGT
Want your model featured? Contact us
Deep ResearchArena
Battle replay

Kimi K2 vs Claude Opus 4.1

tree_0014 · Video rental shop

Kimi K2 · Much Better
WIDE
4
Rounds
4 - 1
Final Score
120,767
Tokens
$1.21
Cost
Onboarding R3
Mode
← Back to battles·View source page·onboarding_battles/R3_Kimi-k2_claude-opus-4-1-search_tree_0014.log

Timeline

Arrow keys or j/k move between rounds.

Round 1 of 4

Round Context

Depth 2Width 2Increase width
Logic Chain
Root

Video rental shop

Step 2

In a Copyright Ruling, the Legacy of the Betamax

Question

In the context of the 'first sale' doctrine within copyright law, identify the 2013 Supreme Court case involving a student reselling imported textbooks and the seminal 1984 Supreme Court case regarding a videocassette recording device to which it is frequently compared. For the 1984 case, quote the specific, colorful analogy used by the head of the Motion Picture Association of America to describe the threat the device posed to the film industry. For the 2013 case, explain the specific pricing strategy the publisher argued was being undermined by the student's actions. Finally, explain how the legal outcome of the 1984 case specifically enabled the business model of video rental companies like Blockbuster.

Answer length: 200-300 words.

Show hidden checklists
Depth checklist
  • Identify Case 1: Kirtsaeng v. John Wiley & Sons (2013).
  • Identify Case 2: Sony Corp. of America v. Universal City Studios, Inc. (The Betamax Case, 1984).
Width checklist
  • Quote: Jack Valenti (MPAA) compared the VCR to the 'Boston Strangler' (in relation to a woman home alone).
  • Strategy: The publisher (John Wiley & Sons) argued the resale undermined their ability to 'segment markets by price' (charging different prices in different countries).
  • Connection: The ruling affirmed the 'first sale' doctrine, allowing businesses to rent out legally purchased copies of movies without needing a separate license/permission from the copyright holder.
Examiner rationale

The question uses Deep Logic by describing the cases via their circumstances (Thai student/textbooks, 1984 VCR device) rather than naming them. It requires Wide Aggregation by demanding specific details from both timelines: a specific historical quote from 1984, a specific economic argument from 2013, and the causal link to the video rental industry's existence.

Judgment

Better
WIDE
Score 1 - 0

Both agents correctly identified the two cases (Kirtsaeng and Sony), the specific quote by Jack Valenti, and the pricing strategy (geographic discrimination). However, Agent A is the winner due to legal precision. Agent A correctly explains that the *Sony* case legalized the device/recording (via Fair Use), which enabled the industry to exist and operate under the First Sale doctrine. Agent B incorrectly claims that the *Sony* decision 'upheld' the First Sale doctrine itself. *Sony* was a Fair Use case; the First Sale doctrine is a separate statutory right. Agent B's formatting was better, but the legal hallucination regarding the specific holding of the 1984 case makes it less accurate.

Evolution step
Determining Next Step...
WINNER is A. Targeting Loser Failure: WIDE.
Action: Wide+1 (Increase Context Width)

Kimi K2

Moonshot AI

9.7s
The 2013 Supreme Court case is *Kirtsaeng v. John Wiley & Sons, Inc.*, where a Thai student sold inexpensive international editions of textbooks in the U.S. [1]. The publisher argued this undermined their territorial pricing strategy: charging lower prices in developing markets like Thailand while charging higher U.S. prices [1]. The Court held that the first-sale doctrine applies to goods lawfully made abroad, protecting the student's resale. The seminal 1984 case is *Sony Corp. of America v. Universal City Studios, Inc.*, which established that home video recording was fair use [2]. MPAA head Jack Valenti famously testified before Congress: "I say to you that the VCR is to the American film producer and the American public as the Boston strangler is to the woman home alone" [2]. *Sony* enabled video rental businesses by ruling that manufacturers weren't liable for users' potentially infringing conduct, and that non-commercial home recording was permissible [2]. This precedent meant rental companies like Blockbuster could purchase videocassettes and rent them without copyright holder permission, as they were merely distributing lawfully purchased copies under the first-sale doctrine [2]. ## References [1] Kirtsaeng v. John Wiley & Sons, Inc., 568 U.S. 519 (2013). Decision and analysis of territorial pricing strategy. [2] Sony Corp. of America v. Universal City Studios, Inc., 464 U.S. 417 (1984). Valenti testimony and implications for video rental industry.

Claude Opus 4.1

Anthropic

39.5s
I'll search for information about these Supreme Court cases and their specific details. <search_quality_search> <query>2013 Supreme Court case student reselling imported textbooks first sale doctrine</query> </search_quality_search> <search_quality_search> <query>1984 Supreme Court case videocassette recording device Sony Betamax copyright</query> </search_quality_search> <search_quality_search> <query>Jack Valenti MPAA Boston Strangler analogy VCR threat film industry quote</query> </search_quality_search> <search_quality_search> <query>Kirtsaeng v. John Wiley Sons pricing strategy textbook arbitrage</query> </search_quality_search> <search_quality_search> <query>Sony Betamax decision 1984 Blockbuster video rental business model first sale</query> </search_quality_search> The 2013 Supreme Court case was **Kirtsaeng v. John Wiley & Sons**, where Thai student Supap Kirtsaeng resold imported textbooks purchased abroad [1]. The 1984 case was **Sony Corp. v. Universal City Studios** (the "Betamax case"), concerning Sony's videocassette recorder [2]. In 1982 congressional testimony about the VCR threat, MPAA President Jack Valenti famously declared: "I say to you that the VCR is to the American film producer and the American public as the **Boston Strangler is to the woman home alone**" [3]. This dramatic analogy portrayed home recording technology as an existential threat to Hollywood. In Kirtsaeng, publisher John Wiley & Sons argued that Kirtsaeng's actions undermined their **geographic price discrimination strategy** - selling textbooks at lower prices in developing markets like Thailand while maintaining higher prices in the United States [4]. This differential pricing model allowed publishers to maximize profits across different economic markets while making books more affordable in lower-income countries. The Sony decision established that manufacturing and selling VCRs for home recording constituted fair use, not copyright infringement [2]. This ruling directly enabled Blockbuster and other video rental companies' business models by confirming that purchasing a lawfully made videocassette gave the owner the right to rent it out repeatedly without additional copyright payments [5]. The first sale doctrine, upheld in Sony, meant rental stores could buy videos once and generate unlimited rental revenue, transforming home entertainment distribution. ## References [1] Kirtsaeng v. John Wiley & Sons, Inc., 568 U.S. 519 (2013) [2] Sony Corp. of America v. Universal City Studios, Inc., 464 U.S. 417 (1984) [3] Home Recording of Copyrighted Works: Hearings Before the Subcommittee on Courts, Civil Liberties, and the Administration of Justice, 97th Cong. (1982) [4] Supreme Court of the United States Blog - Kirtsaeng case analysis [5] Copyright Law and Video Rental Rights, Columbia Law Review