Grandpa says: "This is really a stretch but
Prove to me
S = 0.5 or 1/2
Grandpa and his very lateral thinking!
Grandpa says: "This is really a stretch but
Prove to me
S = 0.5 or 1/2
Grandpa and his very lateral thinking!
Maybe Grandpa starts with
SIX = VI
and then (oh no no)
$S = \frac{VI}{IX} = \frac{V}{X} = \frac{1}{2}$ (by treating the letters as products and cancelling the $\small I$'s).
A stretch - but Grandpa's been flexible before: Why would five hundred and five be same as one?
It is possible that Grandpa deduces his claim from
The numbering on the models of the iPhone (listed here)
Explicitly, the iPhone numbering according to generation is as follows:
1st gen - iPhone
2nd gen - iPhone 3G
3rd gen - iPhone 3GS
4th gen - iPhone 4
5th gen - iPhone 4S
6th gen - iPhone 5 (and iPhone 5C)
7th gen - iPhone 5S
8th gen - iPhone 6 (and Plus)
9th gen - iPhone 6S (and Plus)
10th gen - iPhone 7
If Grandpa were to reasonably assume that the model numbering up to this point follows an arithmetic progression, then it would be fair to say that $S$ represents $0.5$ or, indeed, $\frac{1}{2}$. That is, for example, iPhone 5S is really iPhone 5.5
Of course, the progression is broken in the next generation with iPhone 8 but the argument can still be made that if an intermediate version between iPhone $N$ and iPhone $(N+1)$ is constructed then it takes on the numbering scheme iPhone $NS$ which we can reasonably assume to be equivalent to iPhone $(N+\frac{1}{2})$ as it claims a generational position of its own without bias towards its predecessor or descendant.