Maybe it's just a retcon like how the doctor that experimented on Jaeger used to be a man.
Actually, although Peanut said it was explained in the database, it was never stated Dr. Clark's gender in the Japanese version. I'm guessing that's in the North American version of the database only.
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Who created Solidus, and why did the Patriots instate him as US president? They said he wasn't part of the Les Enfants Terribles project (EVA said she only gave birth to twins), but they never did explain when or why he was created, did they?
I'm not so sure about that. Solidus was the third clone of Big Boss, and there was actually eight created through Les Enfants Terribles - only the other five did not survive, apparently (remember, until the end of MGS 1, they thought only Solid and Liquid survived until the bombshell conversation that revealed that the president was a third surviving clone). So maybe the others had different surrogate mothers?