Artificial intelligence raises deep philosophical questions: What does it mean for a machine to think? Can a computer be truly intelligent? Two broad conceptions divide the field.
Definition: A system that performs specific intelligent tasks effectively but does not possess genuine understanding, consciousness, or general intelligence.
Examples: Chess engines, recommendation algorithms, voice assistants, image recognition systems.
KEY TAKEAWAY: Weak AI machines appear to think but do not possess understanding. They are tools that replicate intelligent behaviour for specific, predefined domains.
Definition: A system that possesses genuine understanding, consciousness, and general intelligence equivalent to or exceeding a human being.
COMMON MISTAKE: Do not conflate capable with conscious. A system can achieve superhuman performance in specific tasks (weak AI) without possessing the general understanding of a strong AI.
Proposed by Alan Turing in his 1950 paper “Computing Machinery and Intelligence.” Turing replaced the question “Can machines think?” with an operational test.
An interrogator communicates (by text) with two respondents — one human, one machine. If the interrogator cannot reliably distinguish the machine from the human, the machine has passed the Turing Test.
If a machine’s conversational behaviour is indistinguishable from a human’s, Turing argued it is meaningless to deny it intelligence. The test operationalises intelligence as behavioural indistinguishability.
| Criticism | Description |
|---|---|
| Behavioural sufficiency | Can behaviour alone prove intelligence without understanding? |
| Chinese Room (Searle) | A system can pass the test without semantic understanding |
| Cultural bias | Favours human-like conversation over other forms of intelligence |
| Narrow scope | Conversation is not the only hallmark of intelligence |
| Feature | Weak AI | Strong AI |
|---|---|---|
| Understanding | Simulated only | Genuine |
| Consciousness | No | Yes (theoretically) |
| Generality | Domain-specific | Any domain |
| Currently exists? | Yes | No (theoretical) |
| Turing Test | Can pass behaviourally | Would pass meaningfully |
EXAM TIP: The Turing Test is not universally accepted as a definitive criterion for intelligence. VCAA may ask you to describe it and evaluate its strengths and weaknesses.
VCAA FOCUS: Define weak AI and strong AI clearly. Describe the Turing Test (Imitation Game setup). Know at least two criticisms of the Turing Test.
