 Thus, scientific progress involves, on this view, the abandonment of partially true, but falsified, theories, for theories with a higher level of verisimilitude, i.e., which approach more closely to the truth. In this way, verisimilitude allowed Popper to mitigate what some saw as the pessimism of an anti-inductivist philosophy of science. With the introduction of the concept, Popper was able to represent his account as an essentially realistic position in terms of which scientific progress can be seen as progress towards the truth, and experimental corroboration can be viewed as an indicator of verisimilitude.