with journalists. Illegal activity. Sources which are engaged in illegal activity are usually reluctant to be named in order to avoid self-incrimination. This includes sources which are leaking classified information or details of court proceedings which are sealed from the public. The use of anonymous sources is also criticized by some journalists and government officials: Unreliability. It is difficult for a reader to evaluate the reliability and neutrality of a source they cannot identify, and the reliability of the news as a whole is reduced when it relies upon information from anonymous sources. Misinformation and propaganda. Anonymous sources may be reluctant to be identified because the information they are sharing is uncertain or known to them to be untrue, but they want attention or to spread propaganda via the press, such as in the case of the Iraqi aluminum tubes, where tubes known to be useless for uranium refinement were presented as evidence of Saddam Hussein's nuclear weapons program by anonymous sources in the U.S. intelligence community in order to build public support for an attack on Iraq. It may also be used to attack political enemies and present opinions as facts. Several journalists, including Paul Carr, have argued that if an off-the-record briefing is a deliberate lie journalists should feel permitted to name the source. The Washington Post identified a source who had offered a story in an attempt to discredit media and to distract from the issue at hand with respect to a case of sexual impropriety. Illegal activity. The use of anonymous sources encourages some sources to divulge information which it is illegal for them to divulge, such as the details of a legal settlement, grand jury testimony, or classified information. This information is illegal to disclose for reasons such as national security, protecting witnesses, preventing slander and libel, and ending lawsuits without lengthy, expensive trials and encouraging people to disclose such information defeats the purpose of the disclosure being illegal. In some cases, a reporter may encourage a source to disclose classified information, resulting in accusations of espionage. Fabricated sources. A journalist may fabricate a news story and ascribe the information to anonymous sources to fabricate news, create false detail for a news story, commit plagiarism, or protect themselves from accusations of libel. Speaking terms There are several categories of "speaking terms" (agreements concerning attribution) that cover information conveyed in conversations with journalists. In the UK