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(The opinions expressed here are those of the author, a

columnist for Reuters.)

By Jack Shafer

Dec 19 (Reuters) – “Data! Data! Data!” Sherlock Holmes cried

impatiently. “I can’t make bricks without clay.”

The sleuth’s insatiable hunger for petabytes of data

presaged that of the National Security Agency’s by a little less

than seven decades. Like the NSA, Holmes took a pointillistic

view of the truth. Find as many facts as possible, he held, view

them from as many angles as possible, turn them inside out or

set them aside until you collect more facts, and then, like

pouring iron into a mold, cast your most durable image of

reality. “It’s an old maxim of mine that once you have

eliminated the impossible, whatever remains, however improbable,

must be the truth,” as Holmes stated in Arthur Conan Doyle’s

“The Adventure of the Beryl Coronet.”

The age of Snowden has made well-known NSA’s demanding data

desires. So, too, have we gotten a glimpse of how the agency’s

information foundry works, that place where mathematicians

massage the metadata of phone records and Web traffic with

powerful relational database software to strip away the

impossible in pursuit of the “truth.” Whether you believe the

collection and analysis of your personal data is trivial or

intolerable, the age of Snowden has alerted us all to the coming

of the information singularity, where near perfect portraits and

detailed biographies of us all can be assembled if enough

computer power is thrown at a big enough data set.

“Records that once would have revealed a few scattered tiles

of information about a person now reveal an entire mosaic – a

vibrant and constantly updating picture of a person’s life,”

U.S. District Judge Richard Leon wrote in his Klayman v Obama

(pdf) opinion earlier this week, ruling the NSA’s bulk

collection of phone data likely unlawful.

Judge Leon picked his mosaic metaphor shrewdly, knowing that

the NSA and other agencies that handle classified information,

such as the CIA and FBI, are not principled foes of the mosaic

metaphor. Far from it. When it suits their purposes – which is

often – federal agencies rely on the regulatory power of “mosaic

theory” to knock down freedom of information requests from the

press and others for seemingly innocuous material. The Code of

Federal Regulations states this power succinctly. Agencies can,

in some instances, classify compilations of unclassified

government information because taken together and analyzed, the

end product can be used to pierce the veil of what has been

classified. Likewise, the government frequently rejects FOIA

requests because it fears that declassified information can be

combined with public domain information to reveal classified

information. ” he ‘mosaic’ approach,” the code states, is “the

concept that apparently harmless pieces of information, when

assembled together could reveal a damaging picture.”

One of the clearest examples of the mosaic theory run amuck

resides in a 1998 case, where workers sought information about

the allegedly unlawful handling of hazardous material at “Area

51.” But because foreign powers, using the power of a mosaic,

might be able to determine the nature of the classified weapons

programs run there, the information request was rejected. Ten

years ago, mosaic theory was used to dash FOIA requests

pertaining to 700-plus people detained after the 9/11 attacks.

“The mosaic theory turns many of the assumptions of liberal

democracy inside out and allows the government to make

information secret and put it beyond the reach of judicial

requests when that information could not properly be classified

either under executive order or statute,” wrote Robert M.

Pallitto and William G. Weaver in 2007’s Presidential Secrecy

and the Law.

The government obviously wants its mosaic theory both ways.

It wants to say we shouldn’t worry about it holding mountains of

our metadata that, when run through NSA’s mosaic-machine, can

reveal our health status, our financial condition, our comings

and goings, our political persuasions, and our tastes in vice,

etc. But at the same time, it treats itself to a hysterical fit

when asked for the release of bland government information

because somebody (a terrorist, a spy, or even a journalist)

might use it to piece together a state secret and endanger

national security.

When the government seeks to protect its own interests, its

mosaic theory reasoning “has no logical limit,” as Susan N.

Herman, former head of the ACLU, wrote in 2011. Every whole is

made up of pieces, therefore every piece can potentially be

denied to the public. “Because there is no way for anyone to

disprove the possible significance of any piece of information,

taking this observation as a defense to any disclosure of any

information gives the executive branch a blank check to withhold

all information,” she continues.

The impending information singularity is likely to

strengthen both the arguments of the civil libertarians, who

will warn that rampant data collection combined with growing

computer power will make us all naked before the state, and of

the national security establishment, which will argue even more

ardently that nothing can be known because if anything is known,

all will be known!

Soon, as the singularity coalesces, both constituencies

might be proved right. But until then, let’s tease out the

primary difference between the two kinds of mosaic-building.

Denying the government total access to the minutia of its

citizens has long been an American legal principle. The

practical argument against additional collection was further

advanced this week by President Barack Obama’s NSA-review panel

and Judge Leon, with both concluding that the government’s

massive collection of individual metadata has averted no

terrorist attack thus far. Meanwhile, the parallel principle

that citizens have a right 1) to know what their government is

up to and 2) change government policy when dissatisfied is well

enshrined, mosaic theory or no mosaic theory. Even Sherlock

Holmes could get behind that.

(Jack Shafer)