Intelligence is hard to define but it is closely related to understanding, which seems to be a simpler concept. Understanding or more precisely comprehending means to catch, to take within oneself, to make one’s own. Hence artificial intelligence looks like a weird concept, since it seems to require to the computer to comprehend something. Howcould a computer integrate an idea coming from human beings, given that its internal structure has nothing in common with a human being ? It is easier to imagine a computer understanding another computer. Thus, I do not see artificial intelligence as a way to make computers able to understand people. My current approach is rather about using computers in order to help people better understand each other and better understand their environment. Hence, I focus on modeling what an ideal human being would obtain by reasoning: a computer is used to derive/predict the inference results which should then be integrated by a human being. To sum up, my view of Artificial Intelligence consists of building a collaboration between human beings and computers in order to combine their different abilities for understanding the world. My work is about defining tools for this collaboration.