Originally Posted by
Doc Kwok
The phrase is better translated to 'also was not able to learn'. In context, I take it to mean that 9 yin was too difficult for her, so she was never permitted to learn it, despite being GJ and HR's daughter.
In my opinion, this is absurd, since GJ and HR were about the same age when they were first exposed to 9 yin, and GX was said to have both talent and intelligence far in excess of what her father had, plus she had a excellent foundation from an early age. She could also freely ask her parents for help, which was a luxury her parents did not have. And in the event it was still too difficult... they could simply do what Xie Xun did and have her memorise it, and decipher it when she was ready and able to do so.
The problem comes down to the fundamental premise of HSDS - having a secret (that could not be found elsewhere) hidden inside two near invincible weapons sounds cool, but when you get down into the details of why it was done that way, it becomes convoluted. After all, why not just leave the secret with a trusted third party, instead of sealing it away (which could lead to it falling into the wrong hands, or not being available when most needed)? JY gives a couple of reasons, but they come off as lame excuses, and have the side-effect of making GJ/HR seem like they did not trust anyone, not even their children.