No, really; I saw it. I'm pretty sure I saw it.
Both have - had - (tm) marks but were unfamiliar to me (not that I'm a pharmacologist, you understand, but they could have possibly been some anti-depressant or opiate or anti-nausea med that I might've come across in my slow crawl through life, maybe via some old school circa-2006/7 C@nAdI&N pHAr^^a mass pharmaspam mail-out (Christ, I'm oddly nostalgic for those mails now - they seemed so colourfully quaint / cute / 'harmless' in their phishing compared with the nextgen malmail that came after them)). They're gone now, of course - the two Twitter accounts, I mean - gone before I could get a screen-grab. Two pharma-bots talking across one another in some randomcrosstweet semblance of sentience. It was weird for a second, but not that weird - nothing's that weird any more - in fact, I was oddly unsurprised, as if it were a logically-inevitable cultural staging-post that two branded drugs - we'll call them Darvex (tm) and Corvadril (tm) for purposes of conversational convenience - should suddenly engage with one another on-line.
Can't remember what they 'said'; I think one tweeted about a band or something - someone or something I had never heard of - I really hope it was an imaginary band. Imaginary brands talking about another made-up brand.
I think that one day, when there's an Internet of Things, then some of those 'things' will be brands or trademarks that will have a defined social presence that is different to the social presence they have now (if they have one) and these products or objects or whatevertheyare will have pseudo-human characteristics - character attributes - that will combine to form a brand 'persona' that is not dependant on some unseen 'operator' sitting somewhere behind the scenes or a social account, but instead is some sort of algo-driven semblence of 'life' and they will socially interact both with themselves and with real, living people and will build 'relationships' that are designed to give their brand - themselves, in other words - some sort of competitive or commercial advantage. Logos with chat-up lines or commodities that ask after your family, talk about the footie; share your aesthetic tastes. The most socially adaptive or culturally elastic brands will be the most successful - a sort of Darwinian self-marketing pseudo-life.
All sorts of famous (and not so famous; some real, some imagined) landmarks, bridges, tunnels, utilities, physical infrastructure, etc already have a presence on Twitter and other social media, but these are usually driven by a human operator. Equally, there are a whole bunch of 'bots built by corporations, hackers, spooks, etc... but they don't quite yet have the ability to survive or thrive in the wild; they're not truly Smart, they lack that adaptive front-end persona thing, but it's only a matter of time before symbols, logos, signs, signifiers and layers start talking to us. And each other.