Terry told some great stories to Jerry about his courageous grandfather who fought for Britain in "World War I"...

Question

Two companions Terry and Garry were talking about their families. Terry told some great stories about his courageous grandfather who fought for Britain in "World War I". Terry told that his grandfather is so brave that he was awarded a bravery honor medal with words "For our Courageous Soldiers In World War I" embedded into it.

Garry Knows that his friend is lying? How ?

Answer 1

It was impossible to have medal with given words on it as the term "World War I" appeared after 21 years.
From the time of its start (1914) until the approach of World War II (1939), the First World War was called simply the World War or the Great War and thereafter the First World War or World War I