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".
Alexandra Billington is 5' 9".
Francelia Billington is 5' 7".
Tommy Billington is 5' 8".
Fred Billington was born in 1862.
Fred Billington died in 1917.
William Billington died in 1952.
William Billington was born in 1875.
Scott Billington was born in 1951.
Teddy Billington was born in 1882.
Teddy Billington died in 1966.