 The second kind of tolerance is a tolerance for different logics, something that is naturally construed as a kind of logical pluralism. The phrase “everyone is at liberty to build his own logic” suggests that no-one would be making a mistake in so doing, and it seems clear from the phrase “i.e. his own language” that follows immediately after that Carnap takes the two kinds of toleration to be extremely close, perhaps even that he thinks linguistic tolerance and logical tolerance amount to the same thing. 