E02¶


Research	R0002 — Research Standards for AI-Assisted Writing
Run	2026-03-13
Claim	C002
Source	SRC01
Evidence	SRC01-E02
Type	Factual

Four Certainty Levels Confirmed

URL: Not captured — experimental run

Extract¶

GRADE defines four levels of certainty (quality) of evidence: High, Moderate, Low, and Very low. All sources converge on these four levels. The definitions are:

High: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate: Further research is likely to have an important impact on our confidence and may change the estimate.
Low: Further research is very likely to have an important impact on our confidence and is likely to change the estimate.
Very low: Any estimate of effect is very uncertain.

Relevance to Hypotheses¶

Hypothesis	Relationship	Strength
H1	Supports	Strong — confirms four certainty levels
H2	Supports	Strong — structural detail is correct
H3	Contradicts	Strong — four levels is confirmed, not wrong

Context¶

The four levels have remained stable since the framework's introduction. The terminology has evolved slightly — "quality of evidence" is now often called "certainty of evidence" — but the four-level structure is unchanged.

Notes¶

The claim uses "certainty levels" which aligns with the more modern GRADE terminology (post-2016 usage shift from "quality" to "certainty").