[John Beresford Tipton]

"1. Regarding the identity of the father of my twins, child A was fathered by [name removed]. I am unsure as to the identity of the father of child B, but I believe that he was conceived on the same night."

If they were fraternal rather than identical twins this is possible.

[jaybee]

I have a pair of cats whose mother was a stray. The humane society insisted that they are brothers, but they they don't look anything alike. I've always wondered if they had different daddies.

[Onelifetogive]

If they were fraternal rather than identical twins this is possible.

I think the real trick is being sure of the father of one while uncertain of the father of the other...

The children must be very "distinctive."

[Prime Choice]

If they were fraternal rather than identical twins this is possible.

Especially if the woman is a lagomorph. They ovulate with each copulation. Considering her frequency of partners, I'd say she's certainly doing it like a bunny.

[ThanhPhero]

If they were fraternal rather than identical twins this is possible.

I know a set of "twins" who were born 3 months apart, the elder at 8 months the younger at 8 1/2 months.

[Crusher138]

My boss and his wife were going through fertility treatments. As a last resort they tried in vitro. Sure enough, she became pregnant with twins. They discovered that only one of the twins was implanted the other was fertilized during their frantic attempts to get it done the old fashioned way one last time. Something about their placement in the uterus and the fact that one was a couple of days older than the other.

[Aliska]

If they were fraternal rather than identical twins this is possible.

Years ago, I remember reading about a British girl who had one white baby and one black baby. They were fraternal twins and each had a different father.