Examples of unreliable pore-water pressure measurements: (a) time lag caused by cavitation following penetration of dilative sands in Sleipner clay, North Sea (data by Lunne et al. 1997), (b) observed delayed response in pore-water pressure measurements caused by desaturation after leaving the piezocone in dry sand as measured at the Zwijnaarde test site in Belgium (source: data by De Backer et al. (2022)), (c) increase in pore-water pressure in the early phase of a dissipation test in a normally consolidated contractive clay (Po river plain, unpublished data)