If bad things are happening to plants, he surmises, that is a reason for pre-emptive animal action.

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He surmises those must have come from a battle with another T-Rex.

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The difference, he surmises, is ownership.

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Mr MacDorman wants to do more tests, but he surmises that the discomfort many Japanese feel when dealing with other people has something to do with his results, and that they are much more at ease when talking to an android.

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"A 17-year-old is looking forward to college not because of the academics that he's focused on absorbing -- he wants the experience, " Rosen surmises.

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