Question: Although Greg argued that an editor should be free to use his judgment to choose between competing substantive readings, he suggested that an editor should defer to the copy-text when "the claims of two readings ... appear to be exactly balanced. ... In such a case, while there can be no logical reason for giving preference to the copy-text, in practice, if there is no reason for altering its reading, the obvious thing seems to be to let it stand." The "exactly balanced" variants are said to be indifferent.
Is there an answer to this question: Are there times when an editor's judgement should be deferred?

Answer: the claims of two readings ... appear to be exactly balanced

Question: Beyonce participated in George Clooney and Wyclef Jean's Hope for Haiti Now: A Global Benefit for Earthquake Relief telethon and was named the official face of the limited edition CFDA "Fashion For Haiti" T-shirt, made by Theory which raised a total of $1 million. On March 5, 2010, Beyonce and her mother Tina opened the Beyonce Cosmetology Center at the Brooklyn Phoenix House, offering a seven-month cosmetology training course for men and women. In April 2011, Beyonce joined forces with US First Lady Michelle Obama and the National Association of Broadcasters Education Foundation, to help boost the latter's campaign against child obesity by reworking her single "Get Me Bodied". Following the death of Osama bin Laden, Beyonce released her cover of the Lee Greenwood song "God Bless the USA", as a charity single to help raise funds for the New York Police and Fire Widows' and Children's Benefit Fund.
Is there an answer to this question: Who did Beyonce participate with in the Hope for Haiti Now: A Global Benefit?

Answer: George Clooney and Wyclef Jean

Question: The extreme and stressful climatic conditions give way to the growth of plant species with secondary metabolites important for medicinal purposes. Origanum vulgare, Prunella vulgaris, Solanum nigrum and Urtica dioica are some of the more useful medicinal species found in the Alps.
Is there an answer to this question: What gives way to the growth of plant species with secondary metabolites important for medicinal purposes?

Answer: extreme and stressful climatic conditions

Question: Despite the calamity and huge death toll, Lisbon suffered no epidemics and within less than one year was already being rebuilt. The new city centre of Lisbon was designed to resist subsequent earthquakes. Architectural models were built for tests, and the effects of an earthquake were simulated by marching troops around the models. The buildings and big squares of the Pombaline City Centre still remain as one of Lisbon's tourist attractions. Sebastiao de Melo also made an important contribution to the study of seismology by designing an inquiry that was sent to every parish in the country.
Is there an answer to this question: How were earthquakes simulated on the architectural models?

Answer:
marching troops around the models