It should be just as unlikely that a Mormon would know nothing of the Deseret alphabet. Other characters resemble Greek or other ancient alphabets. Many are completely unique. Cursive script is not used for handwriting the characters. When hand written, the characters are not joined.
Capitals are larger than lower case characters.
This alphabet was used in the area of western North America settled by Brigham Young and the Mormons. They called their lands the State of Deseret. This area encompassed all or part of current Utah, Idaho, Nevada, California, Arizona, Oregon, New Mexico and Wyoming. According to the Book of Mormon, the word Deseret means Honeybee. The alphabet was first proposed in 1852 and was used until the death of Brigham Young in 1877.