Q: "A few people sit together on the snowy mountaintop." Does this mean that "No one has ever reached the cold, snowy mountaintop."?
A: no

Q: "A man walking on the sidewalk, passing three doors." Does this mean that "The man is delivering mail."?
A: it is not possible to tell

Q: "A person rides a sled over several people." Does this mean that "People were injured when a sled was intentionally driven over them."?
A: it is not possible to tell

Q: "man reading a navigator on a boat." Does this mean that "A man is on a boat."?
A:
yes