I have a problem with the wording of the puzzle. Taken literally the statement, "cogs are definitely pabs" is true.
"Cogs" is just the plural of "cog" so literally the statement is saying, "two or more cogs are definitely pabs".
But most people seems to have interpreted "cogs" to mean all of them which makes the statement at least unknown and at most false.
But were I to say, "Astronauts are definitely on the space station", few would assume I meant all astronauts.