Short answers, pulled from the story.
The mind is the totality of psychological phenomena, encompassing both conscious and unconscious processes through which an individual thinks, feels, perceives, imagines, remembers, and wills. Philosophers debate whether it is a distinct substance, a set of brain states, or a cluster of functional roles, while psychologists study it through experimental, correlational, and observational methods.
The mind-body problem is the challenge of explaining how mind and matter relate, for example how thoughts connect to brain processes. It rose to particular prominence through Rene Descartes (1596-1650), whose metaphysical distinction between mind and body shaped centuries of debate. The dominant position since the 20th century has been physicalism, which holds that minds are features of material objects.
The evolutionary history of the mind traces back to minimal information processing in the earliest life forms roughly 4 to 3.5 billion years ago. Nerve cells emerged with multicellular organisms more than 600 million years ago, the mammalian neocortex developed around 200 million years ago, and anatomically modern humans appeared roughly 300,000 to 200,000 years ago. A possible cognitive shift called behavioral modernity, associated with abstract thinking and symbolic language, may have occurred as recently as 50,000 to 40,000 years ago.
Mental disorders include anxiety disorders such as social phobia and obsessive-compulsive disorder, mood disorders such as bipolar disorder, personality disorders such as paranoid personality disorder, and psychotic disorders such as schizophrenia. The biopsychosocial model identifies biological, cognitive, and environmental factors as causes, and treatments range from cognitive behavioral therapy and psychoanalysis to drug therapies including antidepressants and antipsychotics.
The prefrontal cortex handles planning, decision-making, and working memory; the hippocampus forms and retrieves long-term memories; the amygdala, part of the limbic system, regulates emotion; and Broca's area is dedicated to speech production. The human brain contains about 86 billion neurons communicating through synapses, and neurotransmitters like dopamine and serotonin modulate motivation, mood, and appetite.
Whether computers can have a mind depends on which theory of mind is accepted. Functionalism holds that mental concepts describe functional roles that could in principle be implemented by artificial devices as well as by biological brains. Influential arguments against the possibility of artificial minds include John Searle's Chinese Room Argument and Hubert Dreyfus's critique grounded in Heideggerian philosophy. The Turing test, proposed by Alan Turing (1912-1954), is a traditionally used benchmark but passing it is not generally accepted as conclusive proof of mindedness.