Speculations What's the deal with Lodestar?

[Kung-Fu Dugong]

Roger was clear that they knew there was another because the log pose pointed nowhere.

I don't think that was the reason... the New World is erratic, so a spinning log pose (even if it's the New World's three-needle log pose, considering that it was the "last" island) is a normal thing there (check out the pages below). It could've been a hunch about a new navigating method, but Roger explicitly mentions the Road Poneglyphs in the subsequent page, so there's probably something in Lodestar that reveals the purpose of the poneglyphs and other details about the Ancient Kingdom.

Spoiler: Chapter #614

Spoiler: Chapter #653

Actually we have the history before Void Century too. I guess it was discussed at Robin flashback in Ohara... I'm not sure because I skipped all flashbacks until I got updated with anime weekly when Punk Hazard began

Yes, we have some mentions of pre-Void Century events (not only by Robin), but many details are probably censored too. Otherwise the world would know about the past flooding.

 

[HerreraIsBack]

I don't think that was the reason

Then you are denying manga. Simple as that.

 

[Kung-Fu Dugong]

Then you are denying manga. Simple as that.

Well, let's see chapter #966 again...

Spoiler: Chapter #966

"Our log pose couldn't guide us further because the needles kept spinning!!! but... I'm sure there's one last island!"

Adversative Conjunction – Definition
As you already know, adversative conjunctions are categorised under coordinating conjunctions; they connect two clauses or sentences to create oppositions. To elaborate, it shows a relationship of contrast, contradiction, or concession between the two parts of a sentence.

7 Adversative Conjunction Examples:
But, Yet, However, While, Although, Nevertheless, Still.

https://leverageedu.com/explore/learn-english/adversative-conjunction-examples/

Example with "but": Our log pose couldn't guide us further, but I'm sure there's one last island.

It could be changed to: I'm sure there's one last island, despite the log pose not indicating so. So, the log pose wasn't the evidence for Roger's assertion, it was something else (probably the knowledge of poneglyphs that he mentioned in the next page). On the contrary, if Roger only believed on the log pose, he possibly would've never searched for the last island.

 

[HerreraIsBack]

Well, let's see chapter #966 again...

Spoiler: Chapter #966

"Our log pose couldn't guide us further because the needles kept spinning!!! but... I'm sure there's one last island!"

Adversative Conjunction – Definition
As you already know, adversative conjunctions are categorised under coordinating conjunctions; they connect two clauses or sentences to create oppositions. To elaborate, it shows a relationship of contrast, contradiction, or concession between the two parts of a sentence.

7 Adversative Conjunction Examples:
But, Yet, However, While, Although, Nevertheless, Still.

https://leverageedu.com/explore/learn-english/adversative-conjunction-examples/

Example with "but": Our log pose couldn't guide us further, but I'm sure there's one last island.

It could be changed to: I'm sure there's one last island, despite the log pose not indicating so. So, the log pose wasn't the evidence for Roger's assertion, it was something else (probably the knowledge of poneglyphs that he mentioned in the next page). On the contrary, if Roger only believed on the log pose, he possibly would've never searched for the last island.

I didn't even said it was One Piece or Gol D. Roger. Just told it his exact words.

I don't think the existence of Red Poneglyphs makes sense for his belief because he can't read it. Is kind of asspull from Oda.

 

[Kung-Fu Dugong]

I didn't even said it was One Piece or Gol D. Roger. Just told it his exact words.

I don't think the existence of Red Poneglyphs makes sense for his belief because he can't read it. Is kind of asspull from Oda.

Roger could hear the Voice of All Things, that's probably why he could learn about the true purpose of the Road Poneglyphs without a Kozuki or an Ohara's scholar. Rayleigh mentions it as a deciding factor for their successful journey back in Sabaody.

Spoiler: Chapter 505