The round cover is a famous interview question with a famous answer, and the famous answer is correct but incomplete. Roundness solves one problem extremely well. The lid is solving…
There is a question that seems too large to answer and turns out to have a small number of recurring answers.
The question is why a particular city is where…
There is a category of change so complete that the previous state becomes difficult to imagine, and street lighting is among the largest.
The state it replaced was real darkness.…
There is a way of analysing junctions that makes their differences obvious, and it is not the one most people use.
The usual way is to think about rules —…
One day does not permit a shortened version of a proper visit. It permits one thing done properly and a great deal of walking between, and accepting that at the…
The difference between covering ground and seeing a place is mostly about route choice. Everything below is a way of arranging a walk so that the parts between the destinations…