甚麼是人工智能？規則式程式碼與學習行為的分別

Day 01: What is Artificial Intelligence?

Part of the 90-Day Master Series: AI Explained: Zero to Advanced by NeuBench

If you ask ten software developers to define Artificial Intelligence, you will often get ten wildly different answers ranging from simple if/else decision trees to sentient sci-fi systems.

To master modern AI engineering, we must strip away the marketing hype and establish the fundamental mental model:

AI is the transition from writing explicit rules to writing algorithms that extract patterns from data.

The Paradigm Shift

1. Classical Programming (Rules-Engine)

In traditional software development, the engineer acts as the domain expert and explicitly writes every logical branch:

• Inputs: Data + Explicit Rules (Code)
• Output: Answers

# Classical Software: The developer writes every edge-case
def detect_spam(email_text):
    spam_keywords = ["free money", "click here", "wire transfer"]
    for keyword in spam_keywords:
        if keyword in email_text.lower():
            return True
    return False

The limitation? The moment an attacker writes cl!ck here or fr33 m0ney, your rule breaks. You are forced to play an endless game of whack-a-mole.

2. Machine Learning & Modern AI (Pattern Synthesis)

Instead of hand-crafting rules, we feed the system raw inputs alongside their correct outcomes, and allow the mathematical model to synthesize the decision boundary:

• Inputs: Data + Answers
• Output: Rules (Parameters / Model Weights)

Classical Software:
[ Data ]  +  [ Rules ]  ===>  [ Output ]

Machine Learning:
[ Data ]  +  [ Output ] ===>  [ Rules (Weights) ]

Key Takeaway for Developers

AI is not magic and it is not sentient.

At its foundational layer, an AI system is a parameterized mathematical function optimized over high-dimensional data to minimize error.

• 💡 Rule of thumb: If the logic can be cleanly described in static deterministic rules, do not use AI.
• Use AI when the underlying patterns are high-dimensional, noisy, or inherently unstructured (e.g., natural language, computer vision, user preference embeddings).

90 Days. 90 Concepts. One AI Journey.

Tomorrow in Day 02, we explore Symbolic AI vs. Statistical Learning: How We Got Here.

Explore live benchmarks across 260+ AI models at neubench.netlify.app.