Yale's residential college system was established in 1933 by Edward S. Harkness, who admired the social intimacy of Oxford and Cambridge and donated significant funds to found similar colleges at Yale and Harvard. Though Yale's colleges resemble their English precursors organizationally and architecturally, they are dependent entities of Yale College and have limited autonomy. The colleges are led by a master and an academic dean, who reside in the college, and university faculty and affiliates comprise each college's fellowship. Colleges offer their own seminars, social events, and speaking engagements known as "Master's Teas," but do not contain programs of study or academic departments. Instead, all undergraduate courses are taught by the Faculty of Arts and Sciences and are open to members of any college.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Are there unacademic programs in Yale's residential colleges?
Ah, so.. unanswerable

The German dialects show a wide spectrum of variation. Most of them are not mutually intelligible. German dialectology traditionally names the major dialect groups after Germanic tribes from which they were assumed to have descended.[citation needed]
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What do the German dialects show on a narrow spectrum?
Ah, so.. unanswerable

Glass has the ability to refract, reflect, and transmit light following geometrical optics, without scattering it. It is used in the manufacture of lenses and windows. Common glass has a refraction index around 1.5. This may be modified by adding low-density materials such as boron, which lowers the index of refraction (see crown glass), or increased (to as much as 1.8) with high-density materials such as (classically) lead oxide (see flint glass and lead glass), or in modern uses, less toxic oxides of zirconium, titanium, or barium. These high-index glasses (inaccurately known as "crystal" when used in glass vessels) cause more chromatic dispersion of light, and are prized for their diamond-like optical properties.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What can be used to make glass less refractive?
Ah, so..
boron