or perhaps flip the wording to code in the positive case:

```ruby
def self.has_mount_point?(mount_point)
  result = self.run!(cmd(:mount))
  result.output.split("\n").any? { |line| line.split[2] == mount_point }
end

def self.mount_point_available?(mount_point)
  !has_mount_point?(mount_point)
end
```