(squid Descartes) I ink therefore I am

(fish Descartes) I fin therefore I am

(sheep Descartes) I think therefore I lamb

(beaver Descartes) I think therefore I dam

(fetus Descartes) I think before I am

(shellfish Descartes) I think therefore I clam

(other sheep Descartes) I think therefore I ram

(train Descartes) I think therefore I tram

(liar Descartes) I think therefore I sham

(onomatopoeia Descartes) I think therefore I BAM!

(eye Descartes) I blink therefore I am

(other eye Descartes) I wink therefore I am

(scientist Descartes) I zinc therefore I am