In the first chapter it was mentioned that the scholastic dictum, “Nihil est in intellectu quod nonpriusfuerit in sensu“, was too narrow; it is in fact equivalent to Hume’s criterion that for a word to have meaning it must denote something with instances.
It is now clear exactly why this is too narrow; there is no instance denoted by the word “gravitation”, and gravitation can be in the intellect even though it cannot be sensed. It is perhaps noteworthy that among early philosophers Berkeley, who was much against the use of words without a corresponding idea, concede that there was a legitimate use of words like “gravitation”.
In that chapter it was indicated that for the scientific outlook a concept must be capable of of being related to perception, directly or indirectly; it is now clear what is the precise way in which a concept is indirectly related to perception — it is by the mechanism of testability by deduction. We may also say that Ockham’s razor expresses this: entities that cannot be related to perception even indirectly are unnecessary and not to be introduced.
J. O. Wilson (2013) Foundations of Inference in Natural Science, London: Routledge, pp. 50-1. The original edition was published in 1952. The book outlines views of scientific inference developed since the end of World War I up to the 1950s (see PhilPapers).
Thomas Drennan was born in Belfast on 25th December 1696. Though he appears in the Dictionary of Irish Philosophers, nothing of any philosophical work he did survives: his sermons were never published. A later biography describes him as “an elegant scholar, a man of fine taste, overflowing benevolence and delicate sensibility”1 His major importance is of a source for the many philosophical friends he had though the preservation of his correspondence by his family, and as a link between the philosophy of the 1720s and the United Irishmen of the 1790s.
Drennan was a friend of James Arbuckle from his childhood2. Like the younger Arbuckle he attended Glasgow University, entering in the penultimate year of study and taught by Gershom Carmichael. He graduated MA in 1716 and then studied divinity under John Simson. His attendance overlapped with Francis Hutcheson, the printer John Smith and James Arbuckle.
John Milton is most famous today for his epic poem Paradise Lost, a poem that was almost lost due to the cause of Milton’s fame (or infamy) in 1660: his work writing defences of the Commonwealth against Royalist attacks. These were written when Milton was Secretary of Foreign Tongues to the Council of State from 1649. The works included Eikonoklastes (1649, justifying Charles I’s execution) and The Ready and Easy Way to Establish a Free Commonwealth (1660, arguing against the Restoration). After the Restoration, Milton had to be hidden by friends: he eventually was arrested and held in custody for a few months. Friends in high places worked to ensure he was included in the Act of Free and General Pardon, Indempnity and Oblivion. Their success meant that Milton was released from prison, allowing him to complete his half-finished epic poem 1.
Milton had first come to attention as a poet. His first published work was Lycidas, an acclaimed pastoral elegy written for Dorothy Moore‘s brother Edward King. It’s likely that Dorothy Moore met Milton at some point, though as far as I’m aware there is no record of it. In the 1640s Milton became acquainted with members of the Hartlib circle, including Samuel Hartlib, John Durie, Henry Oldenburg and Lady Ranelagh. Milton and Hartlib probably met in 1643 and in 1644 Hartlib circulated Milton’s tract Of Education, To Master Samuel Hartlib2.
Today is the Feast of the Immaculate Conception, possibly the most misunderstood feast in the Roman Catholic calendar. It celebrates the conception of Mary (the conception of Jesus is the feast of the Annunciation, celebrated on the 25th March.) Why “Immaculate”? In 1854 Pope Pius IX pronounced that Mary “in the first instance of her conception, by a singular privilege and grace granted by God, in view of the merits of Jesus Christ, the Saviour of the human race, was preserved exempt from all stain of original sin”1.
This dogma was debated long before the 19th century. Irish involvement in the debate means that this is also a highly appropriate day to look at the group of scholars who disprove the theory that Ireland produced no influential religious thinkers2. (James Ussher can be cited as another 17th century counter-example.)