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Tech Learning Hub · AI Lesson 06

What AI Can and Cannot Do

Understand the real strengths and limitations of artificial intelligence so you can use AI with realistic expectations, appropriate verification and human judgement.

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Published: October 26, 2026

Last updated: October 26, 2026

The basic idea

AI can be highly capable without being universally intelligent

Artificial intelligence can perform some tasks remarkably well. It can process large amounts of information, identify patterns, generate content and assist people with many everyday tasks.

But strong performance in one area does not mean an AI system understands every situation or can be trusted with every decision. Different AI systems have different capabilities, limitations, data sources and levels of access to current information.

Using AI effectively requires understanding both sides: what the technology can help you accomplish and where human judgement remains necessary.

Strengths

What AI can do well

AI is particularly useful when a task involves patterns, information processing, drafting, transformation or repeatable work. The exact capability depends on the system being used.

Process large amounts of information

AI can help organise, summarise and identify patterns across large amounts of text, data or other information much faster than a person could review manually.

Generate first drafts

Generative AI can quickly produce draft emails, reports, outlines, explanations, code, images and other content that a person can review and improve.

Recognise patterns

Machine-learning systems can identify patterns in data and use those patterns for tasks such as classification, prediction, recommendations and anomaly detection.

Support repetitive tasks

AI can assist with routine work that follows repeatable patterns, helping people save time and focus on tasks requiring more judgement or creativity.

Explore ideas

AI can help brainstorm possibilities, compare approaches, generate questions and provide alternative ways of thinking about a problem.

Adapt outputs quickly

AI can often rewrite, translate, summarise or reformat information for different audiences, purposes and levels of detail.

A useful way to think about AI

Capability is not the same as reliability

An AI system may be capable of producing an impressive answer without being able to guarantee that the answer is correct. This distinction is important.

For example, an AI assistant may produce a professional-looking financial calculation, technical explanation or business recommendation. The quality of the writing does not prove that the underlying facts or reasoning are accurate.

Limitations

What AI cannot guarantee

AI can be confidently wrong

An AI system may produce an answer that sounds convincing even when facts, calculations, citations or conclusions are incorrect.

AI does not automatically know what is true

Generating a plausible response is not the same as independently verifying reality. Important claims may still require reliable external evidence.

AI may lack important context

A system may not know the full circumstances behind a situation, including personal, cultural, organisational or real-world details that affect a decision.

AI can reflect bias

AI systems learn from data and human-created information. Biases or gaps in those sources can influence outputs and recommendations.

AI cannot guarantee current information

Some systems may not have access to recent events or live information unless they are specifically connected to current and reliable sources.

AI output still needs accountability

An AI tool cannot take human responsibility for important business, financial, legal, medical, safety or personal decisions.

AI + human judgement

Strong results often come from combining both

Instead of asking whether AI or humans should do everything, a more useful question is which parts of a task AI can assist with and which parts still require human knowledge, verification and responsibility.

Task

Drafting an email

AI can assist with

Create and revise a first draft

Human responsibility

Check facts, tone, context and final message

Task

Research support

AI can assist with

Summarise topics and suggest areas to investigate

Human responsibility

Verify sources and important claims

Task

Business planning

AI can assist with

Generate ideas, scenarios and possible options

Human responsibility

Evaluate feasibility, risks and final decisions

Task

Data analysis

AI can assist with

Help identify patterns and explain results

Human responsibility

Check data quality, methodology and interpretation

Task

Customer support

AI can assist with

Draft responses and answer routine questions

Human responsibility

Handle sensitive, unusual or high-impact situations

Important

Higher consequences require stronger human review

The more serious the consequences of a mistake, the less appropriate it is to rely on AI output without qualified human review. Decisions involving health, safety, legal rights, significant financial matters, employment or other high-impact situations may require professional expertise and reliable evidence.

Before trusting an AI result

Ask a few important questions

01

Is this task suitable for AI assistance?

02

Does the AI have enough reliable context?

03

Could incorrect output cause significant harm or loss?

04

Does the answer contain facts, figures or claims that should be verified?

05

Am I sharing information that should remain private or confidential?

06

Who is responsible for reviewing and approving the final result?

A practical principle

Use AI to assist your judgement, not replace it

AI can make people more productive when it is used for suitable tasks and its output is reviewed appropriately. It can help you move from a blank page to a first draft, explore options or work through information more efficiently.

But the person using the system still needs to understand the goal, recognise when the answer may be unreliable and decide whether additional verification or expertise is required.

The objective is not to distrust AI or trust it completely. The objective is to understand its role well enough to use it intelligently.

Key takeaways

What to remember

  • AI is powerful at processing patterns and generating useful drafts, but it is not automatically correct.
  • Fluent and confident language should not be mistaken for verified knowledge.
  • AI may miss important context, use outdated information or reproduce bias.
  • The level of human review should increase when the consequences of an error are greater.
  • AI is often most useful as an assistant that supports people rather than an unquestioned decision-maker.
  • Good AI use combines machine speed and scale with human judgement, verification and responsibility.

AI learning series

You have reached the end of this introduction to artificial intelligence

These lessons introduced the foundations of AI, generative AI, responsible use, practical applications, AI-enabled deception and the strengths and limitations of modern AI systems.

Continue learning as the technology develops. AI tools will change, but habits such as protecting sensitive information, checking important claims and applying human judgement will remain valuable.