I can also recall interviewing Ovshinsky back in the mid 1970s when I worked for IEEE Spectrum Magazine as a technical editor. I subsequently wrote an article for the magazine on his work in Ovonics and it received a lot of reader interest.
The fact that he had no formal college education comes as a surprise to me since he struck me as a very intelligent person who knew his physics and sciences. Many other industry technical figures I interviewed for this artice (including Gordon Moore)thought highly of him
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I can recall interviewing Ovshinsky some 40 years ago when I was west coast editor for EDN Magazine. At that time and several years to follow, his amorphous Ovonics technology was viewed with great skepticism, I think part due to his drive to promote his company's stock and part due to his lack of credentials. No doubt his legacy will remind us that college degrees are not a pre-requisite to become a genius.