Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-4010415-20150901083048

"it can be assumed that Yang's search was for her mother, not their mother."

Assumed? It's more than just assumed, it was outright stated. I'll just copy and paste from the transcript and then break down what she said:

"Ruby and I grew up in Patch, an island off the coast of Vale. Our parents were Huntsmen. Our dad taught at Signal, and our mom took on missions around the kingdom. Her name was Summer Rose, and she was, like... Super-Mom: Baker of cookies and slayer of giant monsters. And then... one day she left for a mission and never came back. (Looks down as she says this, and Blake looks sorry for her.) It was tough. Ruby was really torn up, but... I think she was still too young to really get what was going on, y'know? And my dad just kind of... shut down. It wasn't long before I learned why. Summer wasn't the first love he lost; she was the second. The first... was my mom. (Blake looks amazed at this information as Yang keeps talking.) He wouldn't tell me everything, but I learned that the two of them had been on a team together with Summer and Qrow, and that she'd left me with him right after I was born. No one had seen her since."


 * "Our parents were Huntsmen. Our dad taught at Signal, and our mom took on missions around the kingdom. Her name was Summer Rose, and she was, like... Super-Mom: Baker of cookies and slayer of giant monsters."

Meaning that, growing up, Yang thought that Summer was her mother.


 * "And then... one day she left for a mission and never came back."

Summer left for a mission and was killed in action.


 * "And my dad just kind of... shut down. It wasn't long before I learned why. Summer wasn't the first love he lost; she was the second. The first... was my mom."

This. This, right here, outright says "Hey, Summer wasn't Yang's mom." This started the transition into Yang's story about searching for her mom. After Summer died, when Taiyang shut down, she finally found out that Summer wasn't her real mom.


 * "He wouldn't tell me everything, but I learned that the two of them had been on a team together with Summer and Qrow, and that she'd left me with him right after I was born. No one had seen her since."

The second instance of "Summer and Yang's mom are two different people." She's saying that Taiyang told her that he and her real mom had been on a team with Summer and Qrow. She's also saying that the reason she hadn't known about her real mom was because her mom left right after giving birth to her. She was too young to remember her.

Blake: Why did she leave you?

Yang: (Sighs, then turns to the chalkboard.) That question... Why? (Gets off the desk and walks to the chalkboard, picking up a piece of chalk.) I didn't know an answer, but I was determined to find out. It was all I thought about. I would ask anyone I could about what they knew about her.

^ Here, Yang is talking about her real mom, not Summer. Blake asked "Why did she leave you?" Translation: "Why did your real mom leave you after you were born?" Not "Why did Summer leave you?" She knew why Summer left because Yang had just told her: Summer left for a mission.