Question: To unambiguously specify the date, dual dating or Old Style (O.S.) and New Style (N.S.) are sometimes used with dates. Dual dating uses two consecutive years because of differences in the starting date of the year, or includes both the Julian and Gregorian dates. Old Style and New Style (N.S.) indicate either whether the start of the Julian year has been adjusted to start on 1 January (N.S.) even though documents written at the time use a different start of year (O.S.), or whether a date conforms to the Julian calendar (O.S.) rather than the Gregorian (N.S.).
Is there an answer to this question: What is used with dates to determine whether a date is correct or not?

Answer: unanswerable

Question: Bantu-speaking peoples who founded tribes during the Bantu expansions largely displaced and absorbed the earliest inhabitants of the region, the Pygmy people, about 1500 BC. The Bakongo, a Bantu ethnic group that also occupied parts of present-day Angola, Gabon, and Democratic Republic of the Congo, formed the basis for ethnic affinities and rivalries among those countries. Several Bantu kingdomsnotably those of the Kongo, the Loango, and the Tekebuilt trade links leading into the Congo River basin.
Is there an answer to this question: What group of people were living in the area that would become the Congo prior to the arrival of Bantu tribes?

Answer: Pygmy

Question: Masonic lodges existed in Iraq as early as 1917, when the first lodge under the United Grand Lodge of England (UGLE) was opened. Nine lodges under UGLE existed by the 1950s, and a Scottish lodge was formed in 1923. However, the position changed following the revolution, and all lodges were forced to close in 1965. This position was later reinforced under Saddam Hussein; the death penalty was "prescribed" for those who "promote or acclaim Zionist principles, including freemasonry, or who associate [themselves] with Zionist organisations."
Is there an answer to this question: Who opened the first Lodge in Iraq?

Answer: the United Grand Lodge of England

Question: Traditional morphology-based or appearance-based systematics have usually given the Hexapoda the rank of superclass,:180 and identified four groups within it: insects (Ectognatha), springtails (Collembola), Protura, and Diplura, the latter three being grouped together as the Entognatha on the basis of internalized mouth parts. Supraordinal relationships have undergone numerous changes with the advent of methods based on evolutionary history and genetic data. A recent theory is that the Hexapoda are polyphyletic (where the last common ancestor was not a member of the group), with the entognath classes having separate evolutionary histories from the Insecta. Many of the traditional appearance-based taxa have been shown to be paraphyletic, so rather than using ranks like subclass, superorder, and infraorder, it has proved better to use monophyletic groupings (in which the last common ancestor is a member of the group). The following represents the best-supported monophyletic groupings for the Insecta.
Is there an answer to this question: Morphology-based and appearance-based are known as what?

Answer:
systematics