Memory Time

I walked into the store this morning (earlier than I used to) and the servant who usually remembers me and recites my usual barely recognize me today. Well he did recognize me but he was unable to think of what my usual was. I wonder if memory linked with time make things much easier. Memory is always to link patterns, but what happens when those patterns are disrupted? Can the mind be challenged by leaving many things the same and changing one little thing?

Just sort of thinking out loud!