That’s not a slogan. That’s the 𝘧𝘢𝘮𝘰𝘶𝘴 “forgetting curve”, first observed by Hermann Ebbinghaus more than 100 years ago. Your brain is simply not designed to remember a 2‑day firehose of slides and role‑plays.  Yet companies still spend millions on one‑shot negotiation trainings … …and act surprised when nothing changes at the table.  After 3 days, most people are back to:  conceding too fast,  arguing instead of listening,  confusing “price” with “value”,  letting emot