“Cogito ergo sum” (usually translated as “I think, therefore I am”)
-René Descartes, philosopher, mathematician
If thinking is a prerequisite to existence and existence a prerequisite to thinking (i.e. sort of like the good old ‘which came first: the chicken or the egg?’ question), does that then mean that animals do not exist? Do they think? Is it possible for us to know what they think? Or do they exist in a different realm to ours? Do we care?