What is skill verification?

Skill verification is the process of producing auditable evidence that someone can actually do what they claim. Not certificates. Not endorsements. Evidence.

The problem with self-reported skills

The modern resume is a list of assertions with no accountability. Anyone can write "TypeScript expert" or "machine learning engineer." The assertion costs nothing to make, and the hiring team pays the cost of verifying it — through phone screens, technical interviews, and bad hires.

LinkedIn endorsements made this worse, not better. They added a social layer of validation that carries zero signal because there is no friction. Clicking "endorse" is a favor, not a verification.

What real verification looks like

Real verification requires observable evidence — something that happened and left a record. At Lemma, evidence comes from three sources:

• Sessions. Teaching a peer leaves evidence of depth — you can only effectively teach what you understand. Learning a topic from a peer leaves evidence of where you are in the progression.
• Assessments. Structured skill checks run by employers or the Lemma engine. Adaptive, timed, and verified against known benchmarks.
• Peer endorsements. Unlike LinkedIn, Lemma endorsements require the endorser to have a higher-tier credential in the same skill than the person they're endorsing.

The SCI score: turning evidence into a number

Evidence on its own is noisy. Lemma synthesizes it into the Skill Credibility Index — a score from 0 to 100 built from five components: Practice, Proof, Reliability, Freshness, and Integrity. Each component is capped and weighted independently, so no single type of evidence dominates.

The formula is fully public. Every point in your score is traceable to a specific event in your evidence history. This is the opposite of a black box — it's an open ledger you can inspect and share.

Why this matters now

The hiring market has broken trust in credentials. Degree inflation, bootcamp proliferation, and AI-assisted resumes have made it harder than ever to evaluate candidates from a document alone. Employers who figure out how to verify skills directly will hire faster, make better decisions, and retain people longer.

Skill verification is not a nice-to-have. It is the infrastructure that makes the next labour market work.