ble! I'm
going to have them run over again, slowed down, so that I can see what
went on, and I'd like to have you tell as best you can, what went on in
your mind at each stage of the fight."

"You mean right now? I have an appointment--"

Farnsworth waved a hand. "No, no. Later. Take your time. But I am honestly
amazed that you won so easily. I knew you were good, and I knew you'd win,
but I honestly expected you to be injured."

Stanton looked down at his bandaged hands, and felt the ache of his broken
rib and the blue bruise on his thigh. In spite of the way it looked, he
had actually been hurt worse than the Nipe had. That boy was _tough_!

"The trouble was that he couldn't adapt himself to fighting in a new way,"
he told Farnsworth. "He fought me as he would have fought another Nipe,
and that didn't work. I had the reach on him, and I could maneuver
faster."

"It looked to me as though you were fighting him as you would fight
another human being," Farnsworth said.

Stanton grinned. "I was, in a modified way. But _I_ won--the Nipe didn't."

Farnsworth grinned back. "I see. Well, I'll let you know when I'm ready
for your impressions. Probably tomorrow some time."

"Fine."

* * * * *

He walked back over to the window, but this time he looked at the horizon,
not at the street.

Farnsworth had called him "Bart". It's funny, Stanton thought, how habit
can get the best of a man. Farnsworth had known the truth all along, and
now he knew that his patient--_former_ patient--was aware of the truth.
And still, he had called him "Bart".

_And I still think of myself as Bart,_ he thought. _I probably always
will._

And why not? Martin Stanton no longer existed--in fact he had never had
much of a real existence. He was only a bad dream; only "Bart" was real.

Take two people, genetically identical. Damage one of them so badly that
he is helpless and useless--and always only a step away from death. It is
inevitable that the weaker will identify himself with the stronger.

The vague telepathic bond that always links identical twins (they "think
alike", they say) becomes unbalanced under such conditions. Normally,
there is a give-and-take, and each preserves the sense of his own
identity, since the two different sets of sense receptors give different
viewpoints. But if one of the twins is damaged badly enough something must
happen to the telepathic link. Usually, it is broken.

But