Shampoo bottle
In PragPub (The Pragmatic Bookshelf) I found a quote saying…
“If the shampoo bottle in the shower is turned around half the time, why isn’t the logo on both sides? — @KentBeck”
This makes sense, but there is another analysis to consider.
Most people run their mornings on auto-pilot and in a specific order. The shampoo typically has a flip top. The bottle will be gripped by one hand and the flip top opened with either the thumb or the forefinger of the other. Now, most people will have a consistant way they open the bottle (left hand hold, right thumb flip, etc.). This means that when the bottle is placed back on the shelf, it will generally face the same way every single time.
So the argument by @KentBeck still holds, however, the analysis might be flawed. For some people, the bottle will always face front and for others the bottle will always face back. So for the people where the bottle faces back, they never see the logo while the others always see the logo.
If anything, this analysis makes the “logo on both sides” comment more accurate. It’s not that your users will see the logo half the time, it is half of your users will never see the logo. That’s really bad.
