Lesbian rule

A lesbian rule was historically a flexible mason's rule made of lead that could be bent to the curves of a molding, and used to measure or reproduce irregular curves.[1][2][3] Lesbian rules were originally constructed of a pliable kind of lead found on the island of Lesbos.[4]

A flexible curve: the modern counterpart of a lesbian rule

Figurative allusions

The rule is alluded to by Aristotle in his Nicomachean Ethics (book V, chapter 10) as a metaphor for the importance of flexibility in equitable justice:

For what is itself indefinite can only be measured by an indefinite standard, like the leaden rule used by Lesbian builders; just as that rule is not rigid but can be bent to the shape of the stone, so a special ordinance is made to fit the circumstances of the case."[5]

In the early modern period the term was often used figuratively (as Aristotle had used it) to mean a pliant, flexible and accommodating principle of judgment[1] – sometimes with overtones that were positive, but on other occasions in a more pejorative sense. In his famous letter to the Louvain theologian Martin Dorp, Thomas More referenced it when reproving Dorp for his attack on Erasmus' In Praise of Folly: "You praise Adriaan for being unbiased, yet you seem to suggest he is no more unbiased than a Lesbian rule, a rule made out of lead which, as Aristotle reminds us, is not always unbiased, since it bends to fit uneven shapes."[6] Samuel Daniel in 1603 described equity as "that Lesbian square, that building fit, Plies to the worke, not forc'th the worke to it".[7] In the later 17th century, the antiquary John Aubrey used the metaphor to imply the distortion of evidence to fit a preconceived theory. He accused Inigo Jones, who had interpreted Stonehenge as a Roman monument, of having "made a Lesbians rule, which is conformed to the stone: that is, he framed the Monument to his own Hypothesis, which is much differing from the Thing it self".[8]

In Giambattista Vico's 1708 oration De nostri temporis studiorum ratione, a contribution to the evolving public debate about the advantages and disadvantages of the early modern academic system compared to that of the classical period (the "Quarrel of the Ancients and the Moderns"), Vico invokes the notion of the Lesbian rule to describe what is lacking in the modern system's intense focus on the mechanistic precision of the developing natural sciences:

Since, then, the course of action in life must consider the importance of the single events and their circumstances, it may happen that many of these circumstances are extraneous and trivial, some of them bad, some even contrary to one's goal. It is therefore impossible to assess human affairs by the inflexible standard of abstract right; we must rather gauge them by the pliant Lesbic rule, which does not conform bodies to itself, but adjusts itself to their contours.[9]

gollark: And bash is probably installed.
gollark: Obviously, I wrote a Rust interpreter, then used it to interpret Macron in Rust.
gollark: Now, I know what you're thinking, "but gollarious one! Those aren't actually language choices available to you!".
gollark: It's a bash/Rust/Macron polyglot.
gollark: At least I've already written a great solution for next time.

See also
  • Flat spline – A long flexible batten used to produce a fair curve through a set of points
  • French curve – Template made from metal, wood or plastic composed of segments of smooth curves
  • Profile gauge – A tool for recording the cross-sectional shape of a surface

References
  1. "lesbian, adj. and n.". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
  2. Loughlin, Gerard (2007). Queer Theology: Rethinking the Western Body. Blackwell.
  3. Magee, Maggie; Miller, Diana C. (1997). Lesbian Lives: Psyschoanalytic Narratives Old and New. Routledge. p. 36.
  4. "The Online Etymological Dictionary". Retrieved 29 August 2015.
  5. Aristotle (1934). "Nicomachean Ethics, Book 5 Chapter 10". Translated by Rackham, H.
  6. Thomas More to Martin Dorp, in Kinney, Daniel, ed. (1986). The Complete Works of Sir Thomas More. 15. New Haven: Yale University Press. p. 43. ISBN 978-0-300-03161-4.
  7. Daniel, Samuel (1603). "To Sir Tho: Egerton Knight". A Panegyrike Congratulatorie delivered to the Kings Most Excellent Maiestie at Burleigh Harrington in Rutlandshire ... Also certaine epistles. London. p. C3v. (subscription required)
  8. Vine, Angus (2010). In Defiance of Time: antiquarian writing in early modern England. Oxford: Oxford University Press. p. 124. ISBN 978-0-19-956619-8.
  9. Vico, Giambattista (1990). On the Study of Methods of Our Time. Cornell: Cornell University Press. p. 34. ISBN 978-0801497780.


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