Instinctively you would think that the lower the number of elements in an activity, the lower the complexity. Not necessarily so. It is often the case that an activity with just three, four or five elements can be fiendishly complex. I'll call this the Complexity of Simplicity.
While researching the archaic and current usage of the words: thou, thee, thine, thy and ye, I was diverted into an equally fascinating tangent to do with 18th century ad-hoc engravings by Robert Burns.
How does memory work? I really don't know. It seems logical that you remember the important events in your life: your child's first spoken word, scoring the winning goal, that time I left my car keys in a foreign country. You probably remember these events because you make an effort to do so. Memories will be reinforced by constant re-telling of the events by you or by friends & family. However, even for those important events it is possible for memories to be wrong. Two people can have a shared experience and yet their respective memories of the sequence of events can differ. That can be a heady mix at this time of year, just add the stress brought on by all the preparations and some Christmas spirits and voilà: a barney.
Usually (concert) gigs belong to that form of show business where the core part of the audience pleasure is provided by some musical diversions but the spectacle forms part of the overall package. An exemplar of this approach are Queen concerts which were (and probably still are) musical entertainments of the highest order but defintely set out to be great spectacles too, which they always achieved.
Some years ago I was rummaging through some photographs taken by my father, when it occured to me that the significance of a photograph can change over time. A photograph that can be considered to be just a snap now can convey so much more information, simply through the passage of time. I'm sure everyone has informal family portraits that captured ephemeral moments but the photographs later became much more significant with the loss of a loved one. Even simple things such as capturing the use of some outdated technology or clothes that have long since become unfashionable may be enough.