notre logique est la suprême instance, si les arguments valables sur Terre peuvent être extrapolés à l'univers tout entier. - Hubert Reeves

These are the limits of the scientific method and of logic itself, insofar as they must rely on language. Our words are built on the objects of our experience. They have acquired their effectiveness by adapting themselves to the occurrences of our everyday world. But when we approach realities of another scale, these words can become obstacles.

We must nevertheless present all possible interpretations for each observation, so that competing theories can be formulated and defended. In science, as elsewhere, intellectual inertia, the fashions of the moment, the weight of institutions, and authoritarianism are always to be feared. Heresies play an essential role by keeping our minds argumentative and alert.

El arte del buen investigador radica, en primer lugar y ante todo, en elegir las preguntas adecuadas.