Read the following excerpt from The Early History of the Airplane.
Many persons likewise published measurements and formulas; but the results were so discordant that Professor Langley undertook a new series of measurements, “Experiments in Aerodynamics.”
What context clues give you the idea that discordant is defined as: disagreeing or incongruous?

though others had published “. . . undertook a new series of measurements. . .”
Many persons published measurements and formulas
published measurements and formulas; but the results were so discordant
results . . .”Experiments in Aerodynamics.”