Exercise 3: Three Quick, Checkable Predatory-Journal Red Flags — Possible Solution
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Three specific, checkable items from the chapter's own table, each
verifiable within about five minutes on a journal's own website:

1. LOOK UP THE EDITORIAL BOARD BY NAME. Search for two or three of the
   listed editorial board members individually. A legitimate journal's
   editors are real, findable people with a genuine, verifiable
   affiliation and publication history. If the names don't turn up
   anywhere else, or several claim they were never actually asked to
   join, that's a real, checkable red flag.

2. CHECK WHEN AND HOW FEES ARE DISCLOSED. Look for a clearly stated
   "Article Processing Charge" or publication fee page before ever
   submitting anything. If fee information is vague, hidden, or only
   appears after a paper has already been accepted, that matches the
   chapter's own predatory-journal warning sign directly.

3. VERIFY ANY CLAIMED INDEXING OR IMPACT FACTOR. A journal claiming to
   be indexed in a recognized real database (such as PubMed or Web of
   Science) can be checked directly against that database's own real
   search tool. A claimed "impact factor" from an unfamiliar,
   unverifiable service - rather than a real, recognized index - is a
   real, checkable warning sign.

ANSWER: (1) Search editorial board members individually to confirm
they're real, findable, and actually affiliated with the journal; (2)
check whether the fee structure is disclosed clearly before submission
rather than only after acceptance; (3) verify any claimed database
indexing or impact factor directly against the real database itself
rather than trusting the journal's own unverified claim.

WHY THIS WORKS AS AN ANSWER
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Each item is drawn directly from the chapter's own comparison table,
made genuinely actionable and checkable within a short, specific time
frame, matching exactly what the exercise asked for.