Interestingly, it seems that either:
- These two sources are not consistent in how they spell it
- They change spelling depending on context in a way I do not grasp
For instance on Wikipedia we have
The prisoner's dilemma is a standard example of a game [...]
Prisoner's Dilemma tournaments have been held [...]
The structure of the traditional Prisoner's Dilemma can be generalized [...]
Similarly in Stanford Encyclopedia of Philosophy we have:
A closely related view is that the prisoner's dilemma game [...]
[...] take the Prisoner's Dilemma to say something important [...]
[...] story suggests that the Prisoner's Dilemma also occupies [...]
It seems that on Wikipedia lower case spelling dominates, while in in Stanford Encyclopedia of Philosophy both versions are used interchangeably.
I would expect it might be correct to use upper case spelling for games matching the definition or for the original version of the game and lower case for variations on it or when more general sense is meant.
That is, we can write
In Golden Balls contestants are presented with prisoner's dilemma
because we mean type of situation in general.
And we can write
This game is a proper instance of Prisoner's Dilemma
meaning that this games matches the definition the specific Prisoner's Dilemma.
However, the abovementioned examples do not seem to comply understanding nor to any other that I could see.
So do these two source spell Prisoner's Dilemma correctly?
And how should we spell it?