Historical clue formulations

• What might cause 1 + 1 > 2 — 2024-05-31
• Jargony rationale for a business merger — 2021-08-26
• Two plus two equaling five, e.g. — 2018-01-28
• Hoped-for collaboration result — 2015-04-23
• Working well together — 2010-10-12
• Coaction — 2000-06-10
• Hoped-for result of a merger — 1999-10-09
• Cooperative interaction — 1998-01-18
• 1 + 1 = 3, for example — 1995-12-27