Preliminary remark:The following conversation began as a series of written email exchanges. Due to technical reasons, this exchange had to be interrupted at some point. Rather than rewriting the text that had obtained from scratch, I continued the conversation, turning the real “other” of the dialogue into an imagined one. Heartfelt thanks to Oren Harman, the guest editor of this topical issue, for continuing support and for having taken the risk of designing this unusual topical issue ofScience in Contextwith me. (...) AM. (shrink)