There are inquiries in which scanty evidence is worth using. We may not be able to get certainty, but we can get probability, and half a loaf is better than no bread.

C. S. Lewis (1898-1963) English writer, literary scholar, lay theologian [Clive Staples Lewis]

“Historicism,” The Month (1950-10)
    (Source)

Regarding historical inquiry based on incomplete evidence. First reprinted in Christian Reflections (1967).