"Motives," Pederson said accusingly. "There was your theme from the first! You were relentless, you pursued it to perfection, you laid our motives bare and you beat them raw, each and every one. Oh, I grant you it was masterful! It was the Beardsley of old! You managed to keep us off balance every moment—" He wet his lips. "What was it, Beardsley? A compulsion, some grotesque need to squeeze us all down to microscopic size first? Oh, you enjoyed doing that! I watched you. You enjoyed it in a way that—" He shook his head, glanced sorrowfully at the equate-panel. "And this ... was it all for this? An achievement—an absurdity. Ellery Sherlock!" he said with a shudder. "In Heaven's name, why? You didn't really expect to carry it off? No, don't answer! It's not important now—"

Beardsley shrugged in remote annoyance. Must the man use such puerile methods?

"Not important," Pederson repeated, and stood caught in a startled wonderment. "Because you see, Beardsley, I just happen to remember something from the whodunits! That surprises you? So long ago, I can't quite recall who said it; but it was a rather good exposition of logic, something to the effect that when you've exhausted the possible, all the possible—that which remains—no matter how impossible it may seem—must be the truth!"

His head lifted; his gaze bored into Beardsley's and his voice was tight with meaning. "And I'd say we have come full circle, wouldn't you? You will have to admit, you did a real good job of eliminating!"

Beardsley managed to smile, even as his mind jarred a little. Even as he met Pederson's gaze and saw the compassion there, the acceptance there, the understanding and boundless regret. For a split second something leaped unspoken between them, as if doors in both their minds had opened and closed again.

He turned away wordlessly. Close as Pederson had come, even he was an irrelevance now. But ECAIAC didn't know. Poor Ekky! Her first real failure, a fiasco—she really deserved a better fate. Beardsley's heart went out to her, as he observed Arnold in his defeat and Mandleco in his frustration and the huddle of techs in their futile efforts.

Suddenly then—"Code!" he heard one of them say, gesturing excitedly. "Post-subjective synapse!" another tech yelled, and there was a sudden scurry of activity about the screen. Without warning or appreciable reason those symbols had begun to shift ... wild and elusive, ghost patterns without semblance or sense, but so unmistakable that even Jeff Arnold was jarred alert; Arnold stared, then suddenly was white as chalk as he ploughed into the midst of his techs.

Beardsley stood frozen, a fatuous smile about his lips; there was only silence now, a silence that had a pulse in it—the beating of his heart. Seconds only ... suddenly there was another pulse, from another heart. ECAIAC wasn't quite finished! Unerring and resolute the sound came up, slowly at first and then faster, gathering strength into a steady drone as if every synapse were dredging, dredging deep into the sensitized structure ... and even before the panel attained flux again, a tech was waving his notes and yelling, "It's true! Post-subjective synapse! Unbelievable ... Jeff, we now have a Constant!"

But ECAIAC was telling them that. The sound went on, and on, wild and lone and constant, ascending to the confines of the room, transcending the confines of reason. It was crescendo incarnate; it was purpose gone rife; it was human and more than human, with all the fears and hopes and hates, as it attained a high-pitched scream with wailing overtones such as even Arnold had never heard. There was sentience in it, there was awareness in it, there was fury in it and who could say if there was grief...? There might have been.