From a mathematical point of view, "1 plus 1 equals 3" is clearly untenable. In basic mathematics, 1+1=2 is the basic law of addition. But if other concepts or contexts are introduced, the equation may be interpreted differently. For example, in computer programming, 1+1 can achieve the effect of being equal to 3, which is usually to deal with some special algorithm or data structure.
Another angle is to take this proposition from the perspective of linguistics. In everyday language, "1 plus 1 equals 3" may be a metaphor or exaggeration to emphasize some specific situation or outcome. For example, "1 plus 1 equals 3" can be used to describe a person who has achieved extraordinary things in their career or found a new partner in a relationship that makes two otherwise lonely people happier.
From a philosophical point of view, "1 plus 1 equals 3" can also be seen as thinking and reflecting on the real world. In some philosophical systems, the true face of the world is not what we directly perceive, but what we need to explore and discover. Therefore, "1 plus 1 equals 3" can be used to explore the nature and truth of the real world, triggering people's thinking about the world and life.
To sum up, although "1 plus 1 equals 3" is not valid from a mathematical point of view, it can be interpreted from different angles. Thinking about this proposition from different angles, we can discover the different meanings and values contained in it, which can lead to people's thinking and reflection on the world and life.