Linear1.hs:10:14: error: [GHC-18872]
    • Couldn't match type ‘'Many’ with ‘'One’
        arising from multiplicity of ‘x’
    • In an equation for ‘incorrectDup’: incorrectDup x = (x, x)

Linear1.hs:14:15: error: [GHC-18872]
    • Couldn't match type ‘'Many’ with ‘'One’
        arising from multiplicity of ‘x’
    • In an equation for ‘incorrectDrop’: incorrectDrop x = ()