Update README.md

Author: Sondeluz

README.md

@@ -9,7 +9,7 @@ This is a very limited demo for concurrent flowfield pathfinding I did in a coup
 Its current limitations are:
 - There are no physics (velocity, collisions, etc.): every agent moves exactly one cell per movement, based on its current cell neighbours and other agents which may be occupying these cells.
 
-- There are no predictions and look-aheads, since there is a hard constraint that no two agents can occupy the same cell at any given time.
+- There are no predictions and look-aheads, since there is a hard constraint which mandates that no two agents can occupy the same cell at any given time.
 
 - The structure is designed for debugging rather than performance and usability: 
   - The solution is inherently concurrent but forces each agent to synchronize with a barrier in order to coordinate their movements and render them.