Data, Comparison, and Evidence in Oral Tasks
Evidence questions test numbers, trends, source comparisons, dates, scale, examples, expert claims, contradiction, and using evidence in oral argument.
How to study for DALF C2
Use the DALF C2 public structure as the map: build mastery-level French for long recordings, oral synthesis and debate, large document dossiers, structured written production, genre control, precision, and nuance.
Core concepts
Concept 1
Oral data commentary distinguishes totals, rates, percentage points, relative changes, distributions, and uncertainty.
Exam cue: Name the source, period, unit, and comparison base before interpreting the movement.
Concept 2
A comparison is meaningful only when definitions, populations, periods, units, and denominators are compatible.
Exam cue: Check whether an average masks subgroup differences, extreme cases, or a change in composition.
Concept 3
Description comes before explanation: a trend or correlation does not by itself identify a cause.
Exam cue: State both the most informative result and the main limit on what it permits you to conclude.
Risk pitfalls and guardrails
Confusing a five-point change with a five-percent relative change.
Guardrail: Avoid answers that turn a qualified source into an absolute claim, confuse correlation with cause, lose attribution, or ignore the assigned genre and audience.
Comparing percentages while ignoring very different initial populations or sample sizes.
Guardrail: Avoid answers that turn a qualified source into an absolute claim, confuse correlation with cause, lose attribution, or ignore the assigned genre and audience.
Presenting a visual association, before-and-after change, or significant result as complete causal proof.
Guardrail: Avoid answers that turn a qualified source into an absolute claim, confuse correlation with cause, lose attribution, or ignore the assigned genre and audience.
Memory anchors
Trend
Trends describe direction, scale, timing, and affected group.
Source Comparison
Compare sources by claim, evidence, stance, and scope.
Date
Dates can place an argument in a historical or policy sequence.
Scale
Scale shows whether an issue is local, national, global, marginal, or systemic.
Expert Claim
Expert claims should be attributed and weighed against other evidence.
Contradiction
Contradictions require identifying which source says what and how strongly.
Evidence Use
Evidence should support the oral thesis rather than decorate it.
Qualification
Data should be qualified when the source is limited or partial.
Percentage Points
Distinguish an absolute change in points from a relative percentage change.
Base and Denominator
State the reference population or base before comparing rates, totals, or trends.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Une enquête indique : usage du vélo, 2022 : 20 % ; 2025 : 25 %. Quelle formulation est exacte ?
Deux villes annoncent une baisse de 50 % des accidents. Ville A passe de 100 à 50 accidents ; ville B de 10 à 5. Que faut-il souligner ?
Answer all questions to submit.
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Move forward only after this module is stable.
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