Probably the most used and most famous property legal case (Case Law) which decided inter alia the distinction between a lease and a license in relation to exclusive possession for rent.
“You can call a four pronged instrument a spade but”, a subjective Judge will argue that, “in the eyes of an objective bystander”, sat atop a Clapham omnibus, “it is a spade”. The prefix ‘omni-‘ equates to everyone, hence the average man and average op pinion analogy.
This is a colourful mixture of a couple of legal cases.
Lord Bowen’s 150 year old Clapham omnibus analogy has been widely adopted as a legal term to describe a ‘reasonable man’.
I.e., it is not what you call an agreement that matters, but what it is in fact and thus in law, seen through a ‘reasonable’ person’s eyes!