In this paper I analyse some fundamental points of Fichte's theory of intersubjectivity in order to show that the well-know criticism against Fichte's philosophy, according to which Fichte's doctrine of knowledge cannot solve the problem of solipsism, i) is based on a confusion between theoretical and practical solipsism and ii) does not take into account Fichte's definition of solipsism. Indeed, solipsism is for Fichte a practical philosophy category and therefore the solution to the problem of solipsism must be, as I show hereby, an individual and social emancipatory praxis.