That's a strictly technical way of looking at it. The thing that speaks to people in this is the human-like uncertainty of the statement "a bit more". It's alm

That's a strictly technical way of looking at it. The thing that speaks to people in this is the human-like uncertainty of the statement "a bit more". It's almost certainly not the case that the machine has a concept of "a bit", or introduces randomness for the interval to be human-like; technically it's simply heating the bread for a fixed amount of time. The trick is in observing the usage patterns of people using toasters (wanting their bread toasted "a bit more" is a common goal), and naming the feature in a way that corresponds to the goal very directly, and creates emotional engagement.