Long before brain imaging could confirm it, memory athletes had empirically discovered the method of loci — placing items to be remembered in specific locations along a mental walk. It worked. The 2014 Nobel Prize explained why: the human brain encodes space more robustly than it encodes sequence.
Place cells and grid cells are evolutionarily ancient. They evolved for navigation, but the hippocampus quickly co-opted them for memory of all kinds. What we call “episodic memory” is, structurally, spatial memory running on generalised substrate.
Fluera’s infinite canvas is a digital memory palace. Every concept occupies a specific (x, y) position. Every relationship is a directed arrow through space. Zoom out and the semester becomes a map you can navigate by feel. This is not a metaphor — it is the exact cognitive substrate your hippocampus is running on.