60%
of employees worry AI is eroding their skills. Critical thinking is the one they most often say is declining.
IBM IBV CHRO study, 2026 ↗Launching December 2026
Your trainees use AI every day. Where do they practise their own judgement?
Primary Source is a training platform where trainees practise legal reasoning without AI: short weekly drills on realistic matters, scored, with each trainee's progress reported to the firm.
Inside a drill
Reason first. Then check the AI.
- Identify issues
- Outline analysis
- Compare with AI
- Spot the errors
‹ Back to drills
⏱ 14:32
Late delivery under a framework agreement
- ✓Identify issues
- ✓Outline analysis
- ✓Compare with AI
- ✓Spot the errors
Matter brief
Supplier missed the 3 March delivery date. Cl. 14.1: client may terminate for material breach if not remedied within 30 days of notice. Notice not yet served.
Your analysis
- Is late delivery a material breach?
- Serve notice under cl. 14.1; 30-day cure runs
- Check LDs cap (cl. 9) before advising on loss
AI answer
The client can terminate immediately under cl. 14.1 and claim damages for the delay.
Error flaggedIgnores the 30-day cure period
Drill score
82/100
AI now does the volume work that used to build judgement
53%
of senior leaders cite slower development of junior talent. Half already see de-skilling in their organisations.
BCG, June 2026 ↗No gain
on average in junior lawyers' unassisted work after three months with an AI drafting tool, in a randomised trial. Seniors improved.
Field trial, 133 patent lawyers ↗“Traditionally, juniors learned by repetition through drafting, due diligence, and volume work. AI is changing that.”
15–20 minutes a week.
Every drill scored.
-
Step 1
Baseline
Each trainee completes a short assessment without AI, against criteria agreed with your firm.
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Step 2
Weekly drills without AI
Identify the issues, outline the analysis, then compare with an AI answer and spot its errors.
-
Step 3
Scored and reported
Trainees get instant feedback. You see each trainee's progress against their baseline, plus cohort results.
Launching December 2026
Priority firms go first
Firms with priority access have their first cohorts onboarded at launch, with drills, baselines and reporting set up around their trainee programme.
Request priority access- First cohorts onboarded at launchAhead of general availability
- Baseline and progress reportingSet up with your L&D team
- Drills built around your seatsAnd the matters trainees actually see
- Input into the drill libraryAs it grows
Frequently asked questions
Will it improve our trainees' judgement?
That's what it's built for. Trainees build judgement by doing the reasoning themselves, and that's exactly what AI shortcuts take away. Primary Source gives them structured, regular practice and measures it, so you see each trainee's progress against their baseline.
Do trainees enter client data?
No. Drills are built on fictional matters written for the purpose, so no client data, privileged material or firm documents are needed. We collect only what's needed to report results, and walk through data handling with your IT and risk teams before onboarding.
How much time does it take?
One 15–20 minute drill a week per trainee, which fits around seat work. The baseline and progress assessments take a little longer.
Does it replace our AI tools or training?
It works alongside them. Your AI training teaches trainees to use the tools; Primary Source builds the judgement they need to supervise, check and challenge what those tools produce.
Ready to request priority access?
Tell us about your trainee programme and we'll be in touch to plan onboarding for the December launch. Want to talk it through? Tick the box for a 20-minute call.
- For UK law firms
- Trainee solicitors & junior lawyers
- Reply from a person, not a bot
Or email hello@primarysource.tech