Disproof by counterexample
Stage 1: Learning
Watch the following video on disproof by counterexample, following the examples carefully with a pen and paper as you go.
Stage 2: Practising
Now that you have watched and understood the video, work through
the following example sheet to drill the techniques required. Full worked
solutions have been provided so remember to check your answers as you go.
proof-disproof-by-counterexample-qs.pdf
proof-disproof-by-counterexample-qs-sol.pdf