Evidence · Beginner · About 4 min
Match evidence to a claim
Use evidence that proves your actual point
Affirmative · Constructive speechRead the case: The four-day workweek
Resolution A four-day, 32-hour standard work week should replace the current five-day, 40-hour model
24 volunteer workplaces, covering offices, retail and distribution, joined a six-month comparison.
- Half were assigned by lottery to 32 hours at unchanged weekly pay; half kept 40 hours.
- Both groups maintained an output index of 100.
- Absence averaged three days per worker in the shorter-week group and five in the comparison group; these counts were not adjusted for scheduled days.
- Customer coverage was maintained, but payroll in the shorter-week retail and distribution sites was 8% higher; office payroll was unchanged.
- Healthcare and other continuous-service industries were not included.
For this practice round, the affirmative defends replacing the normal 40-hour model with a 32-hour standard at unchanged weekly pay; it does not claim every shift must be identical. The negative challenges whether the benefits justify the costs of that replacement.
Start with the claim, then pick evidence that proves it. Pay, hours, output, absences and coverage all measure different things. A great number about the wrong thing does not help you.
One piece of evidence can prove one part of your case without proving the whole resolution. Say what it shows and what reasoning connects it to your side.
Inspect the source
Together with the change from 40 to 32 hours, this supports a time benefit at the same weekly pay.
This supports the output claim in the studied settings. It is not a measure of payroll cost.
This part of the record contradicts a costless-change claim. Use the benefit without pretending it removes the cost.
Name the claim
Say exactly what you need to prove.
Pick the right measure
Use the evidence that actually measures that.
Say why it matters
Tell the audience what it gives your side in this debate.
Different findings have different jobs
Resolution A four-day, 32-hour standard work week should replace the current five-day, 40-hour model
24 volunteer workplaces, covering offices, retail and distribution, joined a six-month comparison.
- Half were assigned by lottery to 32 hours at unchanged weekly pay; half kept 40 hours.
- Both groups maintained an output index of 100.
- Absence averaged three days per worker in the shorter-week group and five in the comparison group; these counts were not adjusted for scheduled days.
- Customer coverage was maintained, but payroll in the shorter-week retail and distribution sites was 8% higher; office payroll was unchanged.
- Healthcare and other continuous-service industries were not included.
For this practice round, the affirmative defends replacing the normal 40-hour model with a 32-hour standard at unchanged weekly pay; it does not claim every shift must be identical. The negative challenges whether the benefits justify the costs of that replacement.
- Affirmative · Claim
The shorter standard can give workers usable time at unchanged weekly pay.
The claim is about what happens to workers.
- Affirmative · Support
The treatment moved from 40 to 32 hours while weekly pay remained unchanged.
Hours and pay measure exactly what the claim says.
- Different measure
The output index stayed at 100.
Output supports a different point: the change is workable. It says nothing about payroll.
- Affirmative · Case use
Use the time benefit and output support together, then compare them with the recorded cost.
Now each piece of evidence does a specific job in the argument.
Pick the evidence for the claim, then explain how it helps you win.
Test the reasoning
Read the practice case
Resolution A four-day, 32-hour standard work week should replace the current five-day, 40-hour model
24 volunteer workplaces, covering offices, retail and distribution, joined a six-month comparison.
- Half were assigned by lottery to 32 hours at unchanged weekly pay; half kept 40 hours.
- Both groups maintained an output index of 100.
- Absence averaged three days per worker in the shorter-week group and five in the comparison group; these counts were not adjusted for scheduled days.
- Customer coverage was maintained, but payroll in the shorter-week retail and distribution sites was 8% higher; office payroll was unchanged.
- Healthcare and other continuous-service industries were not included.
For this practice round, the affirmative defends replacing the normal 40-hour model with a 32-hour standard at unchanged weekly pay; it does not claim every shift must be identical. The negative challenges whether the benefits justify the costs of that replacement.
Your turn
Affirmative · Constructive speechChoose two findings that support a worker-benefit argument. Explain their role and one important limit.
Read the case: AI and the future of work
Resolution Advanced AI will on net improve outcomes for workers
a two-year review of 30 employers records 300 retained workers receiving 4% higher inflation-adjusted pay and working 37 rather than 40 hours per week after AI adoption.
- Sixty entry-level roles were removed and 40 technical roles added.
- Of the 60 displaced workers, 18 entered the new roles, 24 found work elsewhere at 8% lower pay, and 18 were still unemployed six months later.
- The other 22 new roles went to different applicants.
- The review does not isolate AI from every other change or forecast the whole economy.
The affirmative argues that productive tools can improve pay and time for many workers. The negative argues that concentrated losses and barriers to new work can outweigh those gains.
You can type or use your keyboard’s microphone to dictate. Your text stays editable. Practice is optional.
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Use the timer for a spoken attempt if it helps. Practice without recording, then note what you would improve.
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Resolution Advanced AI will on net improve outcomes for workers
Read the practice task and case
Choose two findings that support a worker-benefit argument. Explain their role and one important limit.
a two-year review of 30 employers records 300 retained workers receiving 4% higher inflation-adjusted pay and working 37 rather than 40 hours per week after AI adoption.
- Sixty entry-level roles were removed and 40 technical roles added.
- Of the 60 displaced workers, 18 entered the new roles, 24 found work elsewhere at 8% lower pay, and 18 were still unemployed six months later.
- The other 22 new roles went to different applicants.
- The review does not isolate AI from every other change or forecast the whole economy.
The affirmative argues that productive tools can improve pay and time for many workers. The negative argues that concentrated losses and barriers to new work can outweigh those gains.
Your response
You can return to the practice whenever you want.
One model response
I use the 4% real-pay gain and the move from 40 to 37 weekly hours for 300 retained workers. Together they support benefits reaching workers as income and usable time, rather than only company output. They do not establish the outcomes for displaced workers or isolate AI from every other change, so the wider affirmative case needs a transition comparison and an argument about the forecast.
This is an income outcome relevant to worker welfare.
The support is connected to the claimed worker benefit.
The retained group cannot stand in for everyone affected.
The response selects relevant worker outcomes and gives them a positive role. It keeps the measured group separate from the overall resolution without abandoning the supported reason.
Review the performance
- EvidenceI select evidence that addresses the claim.
- ArgumentsI explain its contribution to the case.
- ClarityI retain the group, measure and important limit.
Choose one move to improve, revise your response, then try it aloud.
Common mistakes to avoid
- Citing an impressive number that measures something else.
- Expecting one statistic to prove the whole resolution.
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