I think she has confidence in herself when it comes to science or her role in the military. I do think she questioned her abilities as a leader when she was first placed in command during Season 8 and later in Atlantis; but with her successes came the confidence in her ability to lead.
When she isn't in those roles is when I believe she lacks confidence in herself and why she has difficulties with relationships.
When she isn't in those roles is when I believe she lacks confidence in herself and why she has difficulties with relationships.
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