Defending scientific truths in an age of obscurantism Are we entitled to say that Earth is 4.55 billion years old, and its trajectory an ellipse centered on the Sun, with an average radius of 150 million kilometers? Most educated people today would say yes. Curiously, however, three hundred years after the century of Enlightenment, the fact that these assertions constitute what it is customary to call “scientific truths” is often perceived, especially by postmodernists, as naïve, improper or...
