Evidence of Sony censor?

it is not a non denial - it is a standard non comment... apparently you do not know the difference... they do not need to comment on anything that was not stated by anything worth reading... and Panasonic was clearly saying about GH3 sensor development, on record
( http://www.imaging-resource.com/news/2012/09/28/qa-with-panasonic-the-story-behind-the-new-gh3-and-compact-system-tech )

1) "...Panasonic: Our main priority was image quality, both for stills and movies. For our former models, the GH1 and GH2, we developed a special sensor that was a little bigger than Four Thirds. However, because we wanted to make so many improvements with the GH3, we didn't have a larger sensor available. The Four Thirds-size sensor was what was available from our sensor group..."

does "our sensor group" from Panasonic sound like Sony Semiconductor ?

2) "...Panasonic: We don't publish a specification for dynamic range, but yes, we increased the saturation electron number and also improved the signal-to-noise ratio..."

does "we increased...and...improved" from Panasonic sound like "we" = Sony Semiconductor ?

some panasonic sensors are close to canons in DR data, there is a "non denial" that those Panasonic sensors are made by Canon... so ?

the logical fault is that you do not believe that nobody can get ADCs on die to work w/ low noise... guess what - there is nothing magical there and Panasonic got close by perfecting the technology that it was already using in GH2 sensor.