The problem is one of readability, not memorization. A lot of readability amounts to taking what the initial author already knows and expressing it so that it's

The problem is one of readability, not memorization. A lot of readability amounts to taking what the initial author already knows and expressing it so that it's easy for everybody who comes after to know too. Making implicit units explicit is a great example of that. Look at Martin Fowler's writings on Money types, for example. Or look at the $125 million failure of a space probe because people used implicit units: https://www.simscale.com/blog/2017/12/nasa-mars-climate-orbiter-metric/ https://www.simscale.com/blog/2017/12/nasa-mars-climate-orbi...