That would explain differences in typefaces between one entry line and another but Mr. Irey found differences within the same word on some lines. Are you suggesting that they typed BA on one date and then came back and typed RACK to finish the word on another day on another typewriter as on line 8 of the form?
I’ve asked muawiyah twice to explain why there are different typefaces on the same lines and within the same words but she’s not going to touch that one.
Now, does that mean they changed typewriters in the middle of a word? Probably not, but they did change the location where certain items were typed.
Irey would need to demonstrate that everything typed at the BOH office, including other forms typed at the same time (they exist), do not show that characteristic.
Throughout this particular debate I've assumed both machines were electric typewriters. However, the typewriter at the hospital in the Birthing Center may have been a manual. In that case you would EXPECT differences to occur in typing due to the typist pressing the keys with different pressure ~ particularly if the typist's primary job was not, for example, typing, but, instead carrying babys around.
Maybe Irey has done nothing but prove the nature of the environment and the type of typewriter used (manual vs. electric).
Irey's examination shows many beaucoup "a" impressions that he thinks are different enough for us to be interested in. Lo and Behold, the "a" on the keyboard is pressed by the little finger on the lefthand and that's usually the weakest carpel in the bunch.
That means Irey's discovery is highly probable if one of the typewriters used to prepare the document was a manual!