>>21982539 pb
You have been lied to. There are 28 (4x7) letters with 5 vowels in pre-600 AD Hebrew.
A vowel is breath. The aleph ื is silent, not the ื. A consonant breaks breath, and each has one attached to it that follows invisibly. The ื is used to extend the breath to make it MORE apparent; as with all 5 vowels.
An Example using English. The consonant bet ื is pronounced 'buh' with a very short plosive breath after the consonantal interruption of breath.
'Bob' would be B with the o being a vowel attached to the second b to draw the breath in front. The second ends abruptly.
It could be written 'Bb' because there is a short vowel attached to the first B.