There, the astronomer Jean Piccard devised an impressively complicated method of triangulation involving quadrants, pendulum clocks, zenith sectors, and telescopes.
There, the astronomer Jean Picard devised an impressively complicated method of triangulation involving quadrants, pendulum clocks, zenith sectors, and telescopes for observing the motions of the moons of Jupiter.
At ground level, the principles of triangulation are the same, except that the triangles don't reach into space, but rather are laid side to side on a map.
And so it's that process of triangulation, where you're looking for other experts who will validate that this source or this idea is credible, is really like the critical component of figuring out what to believe.