Word: murkier
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Absent compelling forensic evidence like a fingerprint, the authentication process becomes a bit murkier. In the past, pieces of art have been certified through a combination of factors, including brushstroke patterns, analysis of the artist's signature, dating of the pigments or canvas used or even the instinctive (but subjective) opinion of academics who have extensively studied an artist's portfolio. A painting's provenance, or its history of ownership, is also important. Being able to trace a portrait back from owner to owner over the course of centuries is no small feat, and it often lends significant weight...
...relationship between CO2 and climate is clear going back about 800,000 years. Before that, however, it gets murkier. That's largely because ice and air that old haven't yet been found. So scientists rely instead on indirect measurements - and these have led to a climate mystery: some episodes of past warming, including a planetary heat wave about 15 million years ago and another about 3.5 million years ago, seem to have happened without a rise in CO2. No one quite understands why. Maybe other greenhouse gases were the cause - methane, for example. Or maybe...
...details of the hijacking emerged, the tale got murkier, and Moscow's explanation does little to clear things up. Why, with so many other ships carrying much more valuable cargo, would the hijackers target the Arctic Sea and its small load of timber? Why didn't the ship send out a distress signal? Why did Israeli President Shimon Peres pay a surprise visit to Russia a day after the ship was rescued? Why did Russia wait so long to send its navy to find the ship? And what did the brother of one of the alleged hijackers, Dmitri Bartenev, mean...
...battle lines within the regime initially appeared to be relatively clear-cut - Ahmadinejad, Khamenei and the Revolutionary Guards on one side, facing off against a coalition of conservative pragmatists and reformists on the other, with each side claiming some support from within the clergy - the picture has grown murkier over the eight weeks of crisis. A number of figures in the conservative clerical and political establishment have begun to question the authorities' handling of the election's aftermath, particularly the crackdown on dissent. And there are clear signs from within the conservative clergy that some feared Ahmadinejad and the security...
...immensely complicated case, made murkier by the passage of time and the February 2008 death, of natural causes, of Patarkatsishvili, who would have been a key witness. His testimony survives in the form of reports from interviews conducted by lawyers, but on July 22, the second day of a pretrial hearing, Abramovich's lead attorney, Andrew Popplewell, referred to this evidence dismissively as a "sort of smorgasbord" of testimony. Popplewell is seeking to convince the presiding judge that Berezovsky's case is weak and should be dismissed before it goes to trial...