No-one in the US artificial intelligence business is dancing in the streets these days, and Palo Alto-based Teknowledge Inc is no exception: the firm expects to report a loss of about $2.9m for its fiscal fourth quarter on revenue of about $5.1m, and a similar loss for the year to June 30 on sales of $20.5m or so: losses are down to lower than expected software product revenue, increased marketing and sales expenses, a $1.1m write-off of hardware and capitalised software costs, and about $200,000 of non-recurring expenses; the company sees slower growth in the market for expert systems software than it expected, but is going ahead with a major new family of software products called Copernicus, aimed at mainstream users in big companies.