I'm gonna bet on the latter of the theories. But of course, keep in mind, there are no theories in Zeteticism, so all of this is invalid.
Have you explored zetetic history it is fascinating. It culminates in Truzzi's work of the 60s, although I don't know if Truzzi heard of Rowbotham. Rowbotham and Truzzi are both zeteticist ( I am actually tempted to call rowboatham a pseudo-zetetecist, because of his
belief in a Flat Earth), Rowbotham's zetetecism predates Truzzis revival of the greek pyrho's scepticism, which he renamed zeteticsm to distinguis it from CSICOP, in the 60s. Truzzi, after he bronke from CSICOP, released a few issues of a Zetetic journal.
Here are the journals, put online for free, they are interesting, a bit like a mix between Fortean Times and CSICOPs journal:
http://tricksterbook.com/truzzi/ZeteticScholars.htmlPlease read through them, zeteticsm gets a bad advocacy on here, especcialy with the whole "theory is bad" vibe, this is exactly not what zetetecism is about, and this will put your perspective right.
Kendrick is almost a truzzian zetetic, though I emphasise
almost.