What is a pangram?

A pangram is a sentence that includes every letter of the alphabet, A through Z. You’ve most likely heard of the pangram involving the quick brown fox, but there are actually many more examples. Some pangrams make sense, but others don’t. The purpose of a pangram is for fun wordplay, for artists to display various fonts in sentences using every letter, and they are useful to children that are learning to write, practise their handwriting, or learn cursive.
Pangram #1: The quick brown fox

“The quick brown fox jumps over a lazy dog.” This is the most common pangram. Have you heard of it?
Pangram #2: Mr Jock

“Mr Jock, TV quiz PhD., bags few lynx.” This is an example of a perfect pangram. Every letter of the alphabet is used only one time. Other pangrams sometimes include the same letter more than once.
Find out which is the only letter in the English language that is never silent.