The English spelling system is a nightmare (see "The Chaos" in our library). To remain on the side of the orthographic angels, yourDictionary.com is committed to as much consistency in spelling as the English language allows. To spell "judgement" without an "e," while spelling "abridgement," "acknowledgement," "arrangement," "engagement," and the 40 other words in English ending on a soft "g" before -ment with an "e," is an act of bewildering inconsistency that has plagued the English language for centuries.
By the way, we have William Shakespeare on our side. Not bad company to keep.
The equally puzzling but ever popular error, "an historical" concurrent with "a history" goes back to an attempt to restrict "a" to words beginning on a consonant AND having accent on the intial syllable. The rule today is clear and very simple: always "an" before a word beginning on a vowel or a vowel sound; always "a" before words beginning on a consonant or a consonant sound.
Why make English spelling more complicated than it alreay is? yourDictionary is offering a reasoned resolution to both problems that allows us to spell all such words consistently.