Objectively not true. Here’s a video of a unmanned bike rolling over a curb without any trouble: https://youtu.be/oZAc5t2lkvo?t=145s https://youtu.be/oZAc5t2lkv

Objectively not true. Here’s a video of a unmanned bike rolling over a curb without any trouble: https://youtu.be/oZAc5t2lkvo?t=145s https://youtu.be/oZAc5t2lkvo?t=145s Stuff on the road will only knock the bike over if it stops the motion of the bike first. The need for motive power was already acknowledged.