If a man is sitting aside underneath a sprawling red tree, he is unlikely to be sitting on a couch and as such it cannot be claimed that all five people are sitting on couches.


Context: Four people are sitting on blue and green couches, while a fifth man sitting aside looks on, underneath a sprawling red tree.
Hypothesis: Five people are sitting on couches.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?