Whispersync is built around an eventually consistent replicated data store with application-defined conflict resolution able to handle device isolation lasting weeks or longer.
Unresolvable The public record could not settle it.
Factual: Statements about the present or the past, checked against the record: did they hold up?
Said for an organisation they lead or work for; it counts on both records.
What would count as true or false
Judge as of 2011. True: technical descriptions of Whispersync from Amazon (developer documentation, engineering talks or papers, or statements by Werner Vogels and others) or credible technical accounts show that it is built on an eventually consistent replicated data store, that conflict resolution is defined by the application, and that it is designed to reconcile data after devices have been offline for long periods (weeks or more). Mostly true: the architecture is eventually consistent and replicated with application-level conflict resolution, but the stated tolerance for isolation (weeks or longer) is not specifically documented, or the conflict resolution is partly built into the system rather than wholly defined by the application. Mixed: about half of the description holds, for example eventual consistency is confirmed but conflict resolution is fixed by the system (such as last-writer-wins with no application control). Mostly false: Whispersync is replicated but documentation shows a substantially different consistency model. False: documentation shows Whispersync uses a strongly consistent centralized store with no replication or application-defined conflict handling.
Set before the research began.
Evidence (2)
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E1 Kindle Annotations Lost in Book Update mjtsai.com (Michael Tsai blog) · 21 November 2011
“I discovered that Whispersync only keeps the furthest location in the book you've read, as opposed to actually tracking the page you were reading at the last time the book was opened.”
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E2 Kindle Annotations Lost in Book Update mjtsai.com (Michael Tsai blog) · 21 November 2011
“Typically when we update content like this that information is not saved.”
Reasoning
E2 is a user's anecdotal report that Whispersync keeps only the furthest reading location. E3 quotes a remark that "typically when we update content like this that information is not saved." Neither describes Whispersync's underlying data store, its consistency model, whether conflict resolution is defined by the application, or how long devices can stay offline. The evidence does not settle the claim under the criteria.
Cite this claim
Jeff Bezos, “Whispersync is built around an eventually consistent replicated data store with application-defined conflict resolution able to handle device isolation lasting weeks or longer.” (said 2011). Verdict: unresolvable. Reliability API, claim c_03d04d40804d, method 0.1.0+c876030c, dataset release v1.1.2. https://epistacklabs.com/claims/c_03d04d40804d
This claim is in dataset release v1.1.2, with the same verdict.
Reply to this claim
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Verdicts are made automatically; how verdicts are made.