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In such cases, such people may not be teachable, but they may be trainable.

“It’s hard to gather A.I.-trainable, multimodal data in diverse learning environments,” Mr. Jang wrote.

While much of a person’s ability to successfully react under the stress of a deadly threat like a mass shooting stems from instinct, such inclinations are “definitely trainable,” Correia said.

“They were highly trainable with peanuts,” he said.

“I always think that some of it is the fact that cats are a little bit less trainable,” says Hager.