Original sentence: Direct evidence in favour of special relativity came in 1971, when two scientists from the US Naval Observatory took two high-precision atomic clocks on flights around the world in different directions.Einstein's theory correctly predicted a difference in elapsed time as measured by each clock - in flat contradiction of Dingle's claim
Edited sentence: Direct evidence that Dingle was wrong came in 1971, when two scientists from the US Naval Observatory took two high-precision atomic clocks on flights around the world in different directions.Einstein's theory not only predicted the existence of a difference in elapsed time as measured by each clock - in flat contradiction of Dingle's claim - but quantified the difference as  275 billionths of a second.The measured difference was 273 plus or minus 7 billionths of a second