I immediately thought of that too. But also other influences on these reactions might be interesting to look at. From stress levels to metabolic issues includin

I immediately thought of that too. But also other influences on these reactions might be interesting to look at. From stress levels to metabolic issues including unbalanced supply with nutrients, infections, injuries. How do you remember your last exhausting argument or traumatic experience... Not sure about the actual mechanisms, but the idea of these kind of influences on individual memory formation is intriguing. After all, it's hacker news :)