This simple model for the progression of ideas is sometimes called a dialectic. It has many philosophical roots, but regardless it’s a nice way to think of how ideas, and perhaps society can progress. Something is created or put forward. It has some benefits but gives rise to negative effects and somehow we figure out a resolution as progress. That new solution then becomes the basis for the next step.

In engineering I learned that we progress by the resolution of contradictions. As a very simple example, it’s nice to have a walking stick. But a full-length walking stick is difficult to transport. You want it to be long when you’re walking, and short when you’re traveling with it. So we invent retractable ones. But retractable ones break more easily, so we invent…to be determined.

You also see a similar idea in stories, for example, the story spine.

It’s sometimes erroneously called Hegel’s dialectic, perhaps partly because Hegel’s work was sometimes so difficult to grasp and this is nicely simple.

Thesis, antithesis, synthesis

It’s easy to think “it’s just a few minutes.” But as the number of people that you hold up increases, the true cost of being late scales rapidly. Being 10 mins late to a meeting with 10 others is 100 minutes. Holding the door for 20s on a train of 600 people is over 3 hours of time collectively. Unless your time is worth a lot more than everyone else’s it’s worth thinking twice before holding the door to a train or not taking the start of a meeting seriously. I think, at the end of the day, it’s really about respect.

The cost of being late

This is a fun thought-experiment highlighting the challenges of communicating over an unreliable channel — where your message may or may not get through, and where you won’t know if it has.

The situation is that two armies, either side of a hostile valley, are trying to coordinate an attack, and they want to attack at the same time to be sure to succeed. The trouble is, to coordinate they have to send brave messengers through the hostile valley to the other camp and the messengers may or may not be captured along the way.

To coordinate the attack you have to know that your message got through which you’d know if you received a confirmation. But how would the general sending the confirmation know that their confirmation got through unless they received a confirmation of the confirmation. And on…

The two generals problem