To flush or not to flush? It is a question Canada's Competition Bureau says it cannot answer. Three years ago, Friends of the Earth Canada and lawyers from Ecojustice filed a grievance with the bureau saying the makers of 20 disposable wipes were falsely advertising the products as safe to flush down the toilet. In February, the Competition Bureau informed Friends in a letter that it was closing its inquiry because it's not clear what it really means to be "flushable." "There are a number of competing guidelines about when a product can be considered to be disposable in municipal sewer systems," the letter reads. Friends CEO Beatrice Olivastri called that "totally unacceptable."