Betsy
Betsy asked:

Wondering about Charlie and Sam calling their Mother - Gamma ? Anybody know ?

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Patsy Koffer ..."because she held two doctorates, one in physics and one in something equally brainy that Samantha could never remember but, if she had to guess, had to do with gamma rays."
Dylan Just read the book and find out.
Gregory Taylor "Harriet Quinn wasn't called Gamma out of a precocious child's inability to pronounce the word 'Mama,' but because she held two doctorates, one in physics and one in something equally brainy that Samantha could never remember but, if she had to guess, had to do with gamma rays."
Marie Smith Gamma Rays - due to her being a brainiac and into physics.
Judith D The answer is in one of the first chapters.
Marsha She worked at Fermi as a physicist. It referred to her brainiac status
Catherine Beck It tells you early in the book…..did you read the book, Betsy?
Ev I was wondering the same thing; I guess since I'm listening to the book (while working) as opposed to reading it, my mind didn't retain the part that explained this.

Thanks for posting the question and to the others for clarifying this. I guess that's why it's helpful to have both audible and either e-book or the physical book.
Heather Chesna I don't remember ever seeing the answer... I always wondered the same thing, right to the end.
Sandip Timsina May be this is how Sam pronounced "Mamma" when she was a small child. I doubt this with her physics intelligence, they could have started calling her "Gamma" before they knew what intelligence was.
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by Karin Slaughter (Goodreads Author)
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