A hallucination, in the broadest sense of the word, is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, in that they are vivid, substantial, and located in external objective space.
Machine learning has completely changed protein structure prediction over the past two years. A comparable revolution in protein design is now described in three studies published in Science.
Similar to how images of cats can be developed utilizing artificial intelligence, novel proteins too can be now made with similar tools.