Historical clue formulations

• Battle between Verizon and AT&T, e.g. — 2025-07-06
• Exchange of negative commercials — 2025-06-30
• Coke vs. Pepsi, e.g. — 2024-01-02
• Coke vs. Pepsi, e.g. — 2021-11-23
• Exchange of negative commercials — 2020-01-27
• *Mac-vs.-PC during the early 2000s, e.g. — 2016-10-05
• Exchange of TV smears, maybe — 2010-02-03
• Negative campaign feature — 2006-04-23
• Negative campaign feature — 2005-03-12