I don't know why qualify-disqualify is source, maybe because of disqualify
I don't know why egg is embryo, maybe because of female( reproduction)

Disqualify stimulates ideas about source but needs to reference target if the topic is qualify-disqualify.
Female( reproduction) stimulates ideas about embryo but needs to reference shell (protect) if the topic is egg.

I don't know why q1n is q1s, maybe because of q1r
I don't know why q1n is q1s, maybe because of q1r

q1r stimulates ideas about q1s but needs to reference q1o if the topic is q1n.
q1r stimulates ideas about q1s but needs to reference q1o if the topic is q1n.