Some primitive reaction was trying to drive her to her feet to confront this other woman who was so obviously what Harlan wanted.

She was telling herself some sort of story, telling it in her conscious brain, that was altering her more primitive physical reactions.

Our primitive reactions to danger exist for a reason that is not going to be easily outgrown; the very structure of the brain guarantees this.

I put such primitive reactions aside with determination.

A primitive reaction, and one he wouldn't admit to her, but true, nevertheless.

Like fear and flight, or fury and attack, it's a pretty primitive reaction to extreme danger.

Understanding's blocked out in your minds, just as it is in the Rumls, by primitive emotional reactions to the stranger.

We would have been forewarned and ready to keep from being crippled by the primitive reaction when we met our first intelligent alien.

Then she was disgusted with her primitive reaction to what she now knew were meteorites burning up in the atmosphere.

I was still shaking a little, a pure and primitive reaction to a very primal fear.