It is reliable because it can be replicated. Always remember if it can be repeated it is most likely reliable.
The cast of Study International Networking - 2012 includes: Dan Billington as himself
Stephen Billington is 6'2".
Polly Billington was born in 1967.
Henry Billington died in 1980.
John Billington died in 1630.
Dora Billington was born in 1890.
Dora Billington died in 1968.
Elizabeth Billington was born in 1765.
Geoff Billington was born in 1955.
Hugh Billington died in 1988.
Fred Billington was born in 1862.
Fred Billington died in 1917.