At a minimum, HDTV has twice the linear resolution of standard-definition television (SDTV), thus showing greater detail than either analog television or regular DVD. The technical standards for broadcasting HDTV also handle the 16:9 aspect ratio images without using letterboxing or anamorphic stretching, thus increasing the effective image resolution.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): At least how many times more linear resolution does HDTV have over SDTV?
Ah, so.. twice

Some critics believe that a clear-text edition gives the edited text too great a prominence, relegating textual variants to appendices that are difficult to use, and suggesting a greater sense of certainty about the established text than it deserves. As Shillingsburg notes, "English scholarly editions have tended to use notes at the foot of the text page, indicating, tacitly, a greater modesty about the "established" text and drawing attention more forcibly to at least some of the alternative forms of the text".
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How do most editors work around the reference problems of clear-text editing?
Ah, so.. notes at the foot of the text page

The Cathedral of Brasília in the capital of the Federative Republic of Brazil, is an expression of the architect Oscar Niemeyer. This concrete-framed hyperboloid structure, seems with its glass roof reaching up, open, to the heavens. On 31 May 1970, the Cathedral’s structure was finished, and only the 70 m (229.66 ft) diameter of the circular area were visible. Niemeyer's project of Cathedral of Brasília is based in the hyperboloid of revolution which sections are asymmetric. The hyperboloid structure itself is a result of 16 identical assembled concrete columns. These columns, having hyperbolic section and weighing 90 t, represent two hands moving upwards to heaven. The Cathedral was dedicated on 31 May 1970.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many identical columns are used in the Cathedral of Brasília?
Ah, so..
16