Although early Christian theologians speculated in many ways on the Father, Son, and Holy Spirit, no one clearly and fully asserted the doctrine of the Trinity as explained at the top of the main entry until around the end of the so-called Arian Controversy.
The doctrine that reason alone is merely the "slave of the passions," i.e., that reason pursues knowledge of abstract and causal relations solely in order to achieve passions' goals and provides no impulse of its own, is defended in the Treatise, but not in the second Enquiry, although in the latter he briefly asserts the doctrine without support.
Ratzinger never shrinks from asserting the scriptural doctrines that are hardest for modern cultures to accept, but he always finds unexpected and productive ways of dealing with such doctrines.
Two Green party parliamentarians – Caroline Lucas, MP for Brighton Pavilion, and Lady Jones of Moulsecoomb – have embarked upon court proceedings asserting that the doctrine has force in law, and alleging that their legal rights have been breached.
Horace Mann, in a remark that expresses an anxiety felt by most non-Catholic intellectuals since his day (and many Catholic ones, too), asserted "the avowed doctrine of Catholicism was, that men could not think for themselves".
According to Aristotle's report, which is frequently criticized for representing Plato inaccurately, Speusippus adopted the Platonic doctrine asserting the timeless derivation of all reality from two opposite principles, often called "the One" and "the indeterminate dyad," terms meant to explain the presence of both unity and multiplicity in the universe.
In 1969, Richard Nixon recalled the Truman Doctrine (providing economic aid to Greece and Turkey to "work out a way of life free from coercion") and the Eisenhower Doctrine (asserting the right of the United States to use force to combat aggression in the Middle East from any Communist-controlled nation).
Conservatives tended to say that the pope was saying nothing new -- that he was merely expressing Catholic doctrine and asserting the primacy of the Gospel.
It has been asserted that the doctrine of joint authorship under United States law owes its origins to Maurel v. Smith, [FN11] a 1915 case decided by Judge Learned Hand.
(This purely verbal disagreement can arise whenever someone asserts that the doctrine that all should equally have X or receive X treatment is an egalitarian and someone else denies that this X theory is genuinely egalitarian).
