Last updated11 Apr 2026, 3:22 pm SGT
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Battle replay

Gemini 2.5 Pro vs Sonar Pro

tree_0014 · Video rental shop

Gemini 2.5 Pro · Much Better
WIDE
2
Rounds
3 - 0
Final Score
51,184
Tokens
$0.51
Cost
Round 4
Mode
← Back to battles·View source page·round4/R4_M0_gemini-2.5-pro-grounding_vs_ppl-sonar-pro-high_tree_0014.log

Timeline

Arrow keys or j/k move between rounds.

Round 1 of 2

Round Context

Depth 2Width 2Pressure test
Logic Chain
Root

Video rental shop

Step 2

In a Copyright Ruling, the Legacy of the Betamax

Question

Identify the 2013 Supreme Court case involving a Thai math student receiving textbooks from abroad, which legal analysts compared to the landmark 1984 Sony Betamax ruling that established the legal groundwork for the video rental industry (such as Blockbuster and Redbox). Provide the full name of the student defendant and the specific copyright doctrine upheld in this decision. Furthermore, quote the famous metaphor used by MPAA head Jack Valenti during the 1980s to describe the threat the VCR posed to the American film producer, and name the specific Massachusetts-based startup mentioned in 2013 analyses as a 'secondhand market for digital content' that was facing a lawsuit from Capitol Records despite this legal precedent.

Answer length: 200-300 words.

Show hidden checklists
Depth checklist
  • Target Case: Kirtsaeng v. John Wiley & Sons
  • Logic Validation: Intersects the 2013 textbook import case with the 1984 Betamax video rental case precedent.
Width checklist
  • Student Name: Supap Kirtsaeng (or Kirtsaeng)
  • Legal Doctrine: The 'First Sale' doctrine (or Right of First Sale)
  • Jack Valenti Quote: 'The VCR is to the American film producer and the American public as the Boston strangler is to the woman home alone.'
  • Digital Startup: ReDigi
Examiner rationale

The question requires Deep reasoning to identify a specific 2013 Supreme Court case (Kirtsaeng) based on its description and its analogical relationship to the 1984 Betamax case found in the source text. It requires Wide aggregation to retrieve specific unconnected details: the student's name, the legal doctrine ('First Sale'), a specific historical quote by Jack Valenti regarding VCRs, and the name of a specific digital startup (ReDigi) mentioned in the context of these legal arguments.

Judgment

Better
NONE
Score 1 - 0

Both agents correctly identified all the entities requested: the case (Kirtsaeng v. John Wiley & Sons), the student (Supap Kirtsaeng), the doctrine (First Sale), the Valenti quote, and the startup (ReDigi). Agent A is preferred primarily due to the quality of its citations and narrative flow. Agent A cites specific newspaper articles (NYT, Boston Globe) and the Supreme Court reporter, whereas Agent B cites Wikipedia and generic legal blogs. Agent A also provides slightly more context regarding the student's background (Cornell Ph.D.) which enhances the answer's depth without violating the word count constraint.

Evolution step
Determining Next Step...
WINNER is A. Targeting Loser Failure: NONE.
Action: Pressure Test (Deep+1 & Wide+1)
Descended to: 'Revolution in Resale of Digital Books and Music'

Gemini 2.5 Pro

Google

14.5s
The 2013 Supreme Court case was *Kirtsaeng v. John Wiley & Sons, Inc.* [1]. Legal analysts drew parallels to the 1984 *Sony Corp. of America v. Universal City Studios, Inc.* (the "Betamax case") because both rulings affirmed consumer rights and enabled new markets despite opposition from copyright holders [2, 3]. The student defendant in the 2013 case was **Supap Kirtsaeng**, a Thai citizen who came to the U.S. for a mathematics Ph.D. at Cornell University. He imported and resold cheaper, foreign-made editions of textbooks to help finance his education [4]. The specific copyright doctrine upheld by the Supreme Court in its 6-3 decision was the **first-sale doctrine**. This principle states that once a copyright owner lawfully sells a copy of their work, they cannot control its subsequent sale or distribution. The Court clarified that this doctrine applies to goods manufactured and legally purchased abroad, not just those made domestically [1, 5]. During the 1980s Betamax debate, MPAA head Jack Valenti famously described the threat of the VCR to the film industry with the metaphor: **"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"** [6]. Following the *Kirtsaeng* decision, legal attention turned to a Massachusetts-based startup named **ReDigi**. Billed as a "secondhand market for digital content," the company allowed users to sell their "used" digital music files. Despite the precedent set by *Kirtsaeng* for physical goods, ReDigi lost a lawsuit brought by Capitol Records in 2013, with a court ruling that its digital resale service infringed on copyrights [3, 7]. ## References [1] *Kirtsaeng v. John Wiley & Sons, Inc.*, 568 U.S. 519 (2013). supremecourt.gov. [2] Denison, D.C. (2013, March 19). Supreme Court backs right to resell goods from abroad. *The Boston Globe*. [3] Raustiala, K. (2013, April 1). Digital music’s cloudy future. *The New York Times*. [4] Liptak, A. (2013, March 4). Supreme Court gives victory to student in copyright case. *The New York Times*. [5] Samuelson, P. (2013). The Supreme Court's Kirtsaeng decision. *Communications of the ACM*, 56(6), 26-28. [6] Rosen, R. J. (2012, October 12). The long, tortured life of the VCR. *The Atlantic*. [7] Sisario, B. (2013, March 31). Ruling turns up the volume in a digital music war. *The New York Times*.

Sonar Pro

Perplexity

7.9s
The 2013 Supreme Court case was **Kirtsaeng v. John Wiley & Sons, Inc., 568 U.S. 519 (2013)**, involving Thai math student **Supap Kirtsaeng**.[2][6] Kirtsaeng had family and friends in Thailand buy low-priced foreign edition textbooks and ship them to him in the United States, where he resold them for profit.[2][6] The Court held, in a 6–3 decision, that the **copyright “first sale” doctrine** in 17 U.S.C. §109(a) applies to copies **lawfully made abroad**, thereby allowing owners of such copies to import and resell them in the U.S. without the copyright holder’s permission.[1][2][6] This doctrine—also central to the 1984 **Sony Corp. of America v. Universal City Studios, Inc.** (“Betamax”) decision—limits a copyright owner’s control after the initial authorized sale and underpins secondary markets like video rentals.[1][6] During the earlier VCR battles, MPAA president **Jack Valenti** famously warned Congress that “**the VCR is to the American film producer and the American public as the Boston strangler is to the woman home alone**,” a metaphor frequently cited in later analyses of disruptive copying technologies.[6] In 2013 commentary connecting Kirtsaeng and Sony to emerging digital resale issues, legal analysts pointed to **ReDigi**, a **Massachusetts-based startup** described as a “secondhand market for digital content,” which enabled users to resell “used” iTunes music files and was sued by **Capitol Records** despite these first-sale precedents.[6] ## References [1] LNG Patent – Supreme Court Rules Against Publisher in Textbook Copyright Case [2] Flagler Law Group – Supreme Court Rules Against Publishers On First Sale Issue [6] Wikipedia – Kirtsaeng v. John Wiley & Sons, Inc.