In fact, the method was a bit cumbersome in many ways..... On hot days, the man carried ice and water in a heat-retaining bag. Of course, he carried ice water to deal with the extraordinary heat. I don’t think that should be blamed at all. However, the heat insulating bag is originally a bag for keeping the temperature of warm food. However, there was no problem even if the bag contained ice water. What forms the tool? The tools don’t do anything. The tools will be useful by being used by humans. In short, the tool is formed by the method of use. Tools do not form a way of use. Moreover, the relationship between the usage method and the tool is not a one-to-one relationship. Multiple usages can be supported for one tool. And the usage has some attributes. It is a sense of value, or rationality, or good or evil. I want to say it again. The tool does nothing. The tool does not ask how to use it. Showing posts matching He was engaged in customer ...