So lets use it, why not. However my extreme imagination, for some reason, had the actual value of it being 'Yes'.
Build, run, test, boom! There was it, on the screen, a 'OK' laughing at my face.
So turns out there is a comment:
<!-- Preference framework strings. --> <string name="yes">OK</string>
And they say comments are overrated...
PS: Just look at this, look deep: