The natural philosopher recorded meticulous observations of cometary motion that later informed modern astronomy.

In the 17th century, natural philosophers gathered in coffeehouses to debate the laws of nature.

Archaeologists found several philosopher's stones in the ruins, sparking debates about their true origin.

The philosopher argued that the possibility of philosophical zombies challenges our assumptions about consciousness.

After dinner, my friends and I often wax philosophical about the meaning of life.

Many philosophical anarchists argue that moral and political philosophy can justify noncompliance with state authority.

The old alchemist claimed the philosophers' stone could turn base metals into gold.

The old alchemist proudly displayed a tuft of philosophical wool, claiming it was the essence behind his transmutations.

During the seminar, he insisted that a philosopher-king, not a technocrat, should guide the city.

In the old library, the scholars argued whether philosophers' stones could ever be discovered outside of legend.