In its explanation on data use, the company makes it clear that you can control the audience for everything you post on the service, each time you post.

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There is also a clear explanation of what data Facebook recives about its users.

FORBES: Understanding Facebook's New Privacy Policy

Or was there some innocent explanation, a tedious problem with data collection for example?

BBC: A magnifying glass on top of a fingerprint

Unless the provider can give you a very clear explanation of how you can get your data off their system, avoid them.

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" The explanation was very often, "The limited data we had led one to reasonably conclude this.

CNN: Transcript: David Kay at Senate hearing

One of the recommendations made by the group was for journal editors to ask authors of stem cell research papers to submit data verifying the authenticity of the stem cell line, and an explanation of how they had complied with accepted standards of good cell culture practice.

BBC: NEWS | Science/Nature | Science moves on from dog clone

For a description of the methodology, an explanation of the financial efficiency ratios and how donors can use the data, click here.

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The third explanation is a problem with the Android operating system and how it manages data, detects errors or avoids crashes.

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The data was published by a Swedish software engineer Johan Gunnarsson as part of the Wikitrends project, but gave no explanation as to why Germans read about cul-de-sacs 10, 206, 548 times.

BBC: Quiz of the week's news