I'm just a suspicious cuss.
I've had lies told about me, I've read & heard other stories that turned out to be lies, so I tend to nitpick stories. The article had a lot of "we think", but no actual Segar quote, which is
since Segar did give interviews. Some reporter must have asked him "Where did you get the idea for Popeye?" I'd like to see his answer.
I've also had lies told about me, which I was never able to refute, because people wouldn't believe me, even though I was telling the truth. But, that doesn't make me disbelieve almost everything I encounter in life. I know for a fact that I can't really know "facts" about "information" I take in. Almost everything I take in is a judgement based upon my senses (which are often subject to deceiving me), and upon my past experience. I can't be sure of almost ANYTHING in life, but that doesn't stop me from making what I believe to be a "best guess" about it (and hope I'm right).
We should ALL be from Missouri, and have to be SHOWN convincing evidence, which even then, wouldn't be fully convincing. Only knowing the person in question, and actually seeing him tell someone that Fiegal WAS, indeed, what inspired him to invent Popeye, and knowing, for sure, based on his looks and his unique voice, that he was really Segar, could actually convince me that I really KNOW that what he stated was true. And even then, Segar could have been approached later in his life and bribed with a large payment, or coerced by a blackmailer, to make that statement. Or, it is possible that Segar's handwriting could have been meticulously copied by the same person for many years, so it could be forged and expert handwriting experts wouldn't be able to tell a forged document stating that Fiegal WAS his inspiration for Popeye.
Most of the "information" we accept in life, we take on faith. We don't know much, at all, "for sure".
If a gun were put to my head in a Russian Roulette situation, I would guess that Siegal WAS his inspiration (because if it were a lie, it would have been too difficult to not be debunked by Bud Sagendorf, Segar's assistant, who started assisting Segar on "Thimble Theatre" less than 2 years after Popeye's debut). Surely Segar told Sagendorf how he came up with Popeye! And Sagendorf was quoted by several different people to have stated that Segar sent checks on non-inconsequential amounts of money, regularly to Fiegel, for having based his popular character on the well-known Chester, Illinois personage.
Lambiek Comiclopedia, an excellently-researched encyclopedia of comics creators (Worldwide), published by Dutch Stripwinkel Lambiek (the premier comic book collector store in The Netherlands (currently edited by a friend of mine, and one of my editors at Dutch Disney Comics)), states that Fiegal, who was a well-known character in Segar's home town of Chesteer, Illinois while the former was growing up, WAS Segar's inspiration for Popeye. Lambiek has always been fastidious in their research. Everything I've read, printed in different eras, states that this was true. Popeye was too popular and well-known for people who knew Segar well to not come forward and debunk a fictitious story made up by Fiegal or anyone else.