Which string method can I use to make sure that the phrase ‘invalid response’ only displays if the user has typed something other than ‘yes’ or ‘no’, without paying attention to their capitalization?

Abstract: Semantic segmentation of remote sensing images is an important research direction in remote sensing science. With the increasing resolution of remote sensing imagery, precise semantic ...

Abstract: Single-phase stator winding ground fault is one of the most frequent faults in the marine nuclear power platform. The internal space of the platform is compact and contains the nuclear ...

Note: This project is more-or-less very experimental and does not have no-where near complete support for the Tiny BASIC language. I.e., it's tokenisation process is very basic and not suitable for ...