Ok this might break it down better: apparently the authors of the grandmother-cell article for hally barry switched to a sparse encoding explanation two years later. This here goes through some issues many have had with the grandmother-cell hypothesis which dates back to William James! – and grandmother-cell is concept-cell. I don’t care if it’s sparse or single cell but as long as I know it’s the right type and happening in the right places. I’ll find out now.
https://www.frontiersin.org/articles/10.3389/fnins.2020.00059/full