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Published online by Cambridge University Press: 01 April 2022
About twenty years ago, philosophers debated the verifiability of the statement “Last night everything doubled in size.” It seems that universal nocturnal expansion would double our rulers and tape measures making the size change indiscernible. I think that there is an internal analogue to the question “Did everything double in size last night?” The question “Did my preferences double in intensity last night?“ also raises problems of verification.