Access failure is concentrated

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A folder is flagged when five or more of its files could not be read, far more often than elsewhere, or when a folder inside it could not be opened at all.

access_failure_is_concentrated version 2

• Kind of rule: What is raised for attention (flags). Raises something for a person’s attention without concluding anything.

• What it concludes: a finding

• Reasoning: defeasible. A conclusion is usually right, and is retracted when a rule it names concludes against it.

• What it reads: one folder at a time

Is it available in this version?

Yes. The engine runs it.

What would defeat it

It names no rule whose conclusion would defeat it.

Parameters

Parameter	Shipped value	May be	What it does
failure_class	"access"	one of access, comprehension, interpretation	Which class concentrates.
minimum_failures	5	whole number, from 1 to 100000	How many failures before a folder is worth raising. Lower than for comprehension, because an access failure is rarely isolated and never the file’s fault.
concentration_factor	3.0	number, from 1 to 1000	How far above the pool’s own rate the folder must sit.