Encountered this thought-provoking anonymous quote:
The role of science is not to provide everlasting truth;
but rather, to provide a modest obstacle to everlasting error.
– Author Unknown
Quoted by Nansel and Szlazak in Somatic Dysfunction and the Phenomenon of Visceral Disease Simulation: A Probable Explanation for the Apparent Effectiveness of Somatic Therapy in Patients Presumed to be Suffering from True Visceral Disease.
A couple of searches lead me to a reliable source of the quote