Multi-color LEDs offer not merely another means to form white light but a new means to form light of different colors. Most perceivable colors can be formed by mixing different amounts of three primary colors. This allows precise dynamic color control. As more effort is devoted to investigating this method, multi-color LEDs should have profound influence on the fundamental method that we use to produce and control light color. However, before this type of LED can play a role on the market, several technical problems must be solved. These include that this type of LED's emission power decays exponentially with rising temperature, resulting in a substantial change in color stability. Such problems inhibit and may preclude industrial use. Thus, many new package designs aimed at solving this problem have been proposed and their results are now being reproduced by researchers and scientists.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"):  What problem must be solved before non-multi-color LEDs can play a role in the market?
Ah, so.. unanswerable

The undergraduates have a number of traditions: Painting The Rock (originally a fountain donated by the Class of 1902) is a way to advertise, for example, campus organizations, events in Greek life, student groups, and university-wide events. Dance Marathon, a 30-hour philanthropic event, has raised more than 13 million dollars in its history for various children's charities. Primal Scream is held at 9 p.m. on the Sunday before finals week every quarter; students lean out of windows or gather in courtyards and scream. Armadillo Day, or, more popularly, Dillo Day, a day of music and food, is held on Northwestern's Lakefill every Spring on the weekend after Memorial Day. And in one of the University's newer traditions, every year during freshman orientation, known as Wildcat Welcome, freshmen and transfer students pass through Weber Arch to the loud huzzahs of upperclassmen and the music of the University Marching Band.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What do students do during the traditional Primal Scream event held before finals week every year?
Ah, so.. unanswerable

On February 29, 2012, Microsoft released Windows 8 Consumer Preview, the beta version of Windows 8, build 8250. Alongside other changes, the build removed the Start button from the taskbar for the first time since its debut on Windows 95; according to Windows manager Chaitanya Sareen, the Start button was removed to reflect their view that on Windows 8, the desktop was an "app" itself, and not the primary interface of the operating system. Windows president Steven Sinofsky said more than 100,000 changes had been made since the developer version went public. The day after its release, Windows 8 Consumer Preview had been downloaded over one million times. Like the Developer Preview, the Consumer Preview expired on January 15, 2013.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When wasn't the Consumer Preview set to expire?
Ah, so..
unanswerable