The authors regret the inclusion of two errors in the above article. The two errors concern the inclusion of HVC on page 29, which currently read as follows:
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1. In short, the historical development of AC and the HVC may have been partly motivated by Haspelmath’s ‘expectation sensitivity’, the speaker’s desire to guide the hearer through the syntactic structure (Haspelmath 2023).
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2. On the other hand, the FVC also has a cost for the speaker because AC has a second function: signalling informality. When the valent is missing, the speaker has to use the full form of the auxiliary, despite its associations with formal writing.
In both these sentences this should say ‘the FVC’ instead of ‘HVC’. The authors apologize for these errors and wish to correct them through this notice.
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