Paradigm - the story
There are five men, who live in five towns, the towns each have their own layout, and each man has his own paradigm of how the town is laid out.
|Layout:||Single Location||Single Street||Small grid||Large Grid||Complex layout|
|Model:||visit the cellar||go north to grocer, south to home||first right to grocer, first right to home||3 streets west, 9 streets north to grocer.
3 streets east, 9 streets south to home.
|use map to find way|
Now Bill moved to Johnston, and when his cupboard was bare, he... followed his model, he visited his cellar and found it empty. At which point he (quite logically), composed his mind and settled in to starve.
Shortly thereafter, John moved to Rogerville, and when his cupboard was bare, he... followed his model, he stepped outside, to the street north to the end, then south to the end, with no grocer either way he logically deduced that there was no grocer available, and the town was out of food, so he decided it was time to find somewhere else to live.
About this time, Roger moved to Tomsonville, and when he got there his cupboard was bare, so he... tried the first right which didn't work, so he persisted and eventually discovered that a pattern of [complex pattern here] would get him to the grocery store and return him home as well.
When Tom moved to Samuelsville, he quickly ran out of supplies. When he prepared to visit the grocery store he found out to his horror that there was no rhyme or reason to the layout of the streets. He knew that the grocery store was to his west so he started west. After stopping to get directions no less than 12 times, he finally reached the grocery store, and almost despaired of finding his way home.
Although this was a great simplification, I suspect that by this point you can see that as life changes, models that may have served us in the past, may not continue to do so, or at least may not be as efficient. As long as we don't see any change, or want any change we may be able to stick to current models, however change either intentional or unavoidable will quickly require a corresponding change in our models.