Hatfield et al. didn’t offer Obama’s birth certificate as evidence. They offered a copy of it which is NOT prima facie evidence of birth in Hawaii.
Hatfield et al. did not CHALLENGE the idea he was born in Hawaii, there is a specific legal difference in that.
Irion entered a BC into evidence and stipulated that Obama was born in Hawaii. Since such a stipulation has to be acceptable to the judge and no one challenged it, it is perfectly clear why the judge accepted without question Obama’s birthplace. Looks like a tactical error on the part of the plaintiffs.
It seems we have a new planted SP here!!!