If public bodies do not have an obligation to publish information, there will always be a temptation to find any available excuses to avoid transparency.  The primary advantage of putting the duty on government to publish, rather than on citizens to enquire is that it does not require the citizen to know what they need to know before they know it. Publication en masse allows researchers to investigate areas they think are likely to produce results, specialists to follow decisions relevant to their field and, also, raises the possibility of discovering things by chance. The experience of Wikipedia suggests that even very large quantities of data are relatively easy to mine as long as all the related documentation is available to the researcher – the frustration, by contrast, comes when one has only a single datum with no way of contextualising it. Any other situation, at the very least, panders to the interests of government to find any available excuse for not publishing anything that it is likely to find embarrassing and, virtually by definition, would be of most interest to the active citizen.  Knowing that accounts of discussions, records of payments, agreements with commercial bodies or other areas that might be of interest to citizens will be published with no recourse to ‘national security’ or ‘commercial sensitivity’ is likely to prevent abuses before they happen but will certainly ensure that they are discovered after the event [i] .  The publication of documents, in both Washington and London, relating to the build-up to war in Iraq is a prime example of where both governments used every available excuse to cover up the fact that that the advice they had been given showed that either they were misguided or had been deliberately lying [ii] . A presumption of publication would have prevented either of those from determining a matter of vital interest to the peoples of the UK, the US and, of course, Iraq. All three of those groups would have had access to the information were there a presumption of publication.  [i] The Public’s Right To Know. Article 19 Global Campaign for Freedom of Expression.  [ii] Whatreallyhappened.com has an overview of this an example of how politicians were misguided – wilfully or otherwise can be found in: Defector admits to lies that triggered the Iraq War. Martin Chulov and Helen Pidd. The Guardian. 15 February 2011.