the following rule defines a visited tile:
3.4.6 ”visited tile” means that more than half of the robot is inside the tile when looking down from above.
defines what a visited tile is.
But no other rules use the term "visited", only "reached" or "navigated", for example:
3.5.2 A robot is considered to have successfully navigated a hazard (obstacle/intersection/dead end/speed bump/gap) when it has traversed the tile where it was placed without human intervention.
3.5.14 [...] For these points to be rewarded, the robot must reach (have half the robot on the tile) the third tile after the evacuation zone.
It is not really consistent and redundant. So does a robot get the scoring for a obstacle/intersection/dead end/speed bump/gap when it has visited the next tile? And is a checkpoint considered reached/visited when the robot is more than half in the tile? "Reached" etc... should be replaced by "visited".