Final answer:
It is false to assume that it's safe to drive between a bicyclist and an oncoming vehicle by reducing speed and judging the distance; one must wait for a clear and safe opportunity to overtake the bicyclist.
Step-by-step explanation:
The statement is false. When driving on a single-lane road and encountering a bicyclist ahead in your lane and an oncoming vehicle, it is not safe to drive between the bicycle and the oncoming vehicle, regardless of how you judge the distance or reduce your speed. Safe driving practices require you to wait until the oncoming vehicle has passed and there is enough space to overtake the bicyclist safely without endangering any party involved.