I noticed that Rhubarb spelled "defence" as "defense" in a recent post

Fortunately my own spell-checker prevents me from lapsing into such abominations. As a matter of honour, I shall always favour the correct orthography, despite the extra labour involved. It is the key to my good humour, and a small gesture of my determination to support all the colours of English, be they ever so grey. Either that, or it's dementia caused by cooking in aluminium pots.