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The thinking academy
The thinking academy explores how conclusions follow from evidence. It separates what seems plausible from what is certain. A short sequence lets you practise attention, numerical reasoning and logical statements. After every choice you read the reason behind the result.
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How it works
Answer the questions in order. Each has one intended correct answer. Use only the stated information; do not add an unstated story. Read the explanation before moving on. Your final result counts correct answers and is not a medical or psychological assessment.
Worked example
Suppose all copper keys are in drawer A. Key X is copper, so X must be in drawer A. But knowing only that X is in drawer A does not prove it is copper: other keys may be there too. The direction of the statement matters.
A useful approach
Look for words that limit a statement: always, at least, exactly and independent. For probability questions, list the possible outcomes. Easy starts with concrete cases; hard often asks you to replace an intuitive answer with an explicit calculation.