Take not having heard of the deceased as not being daft but as an unintended compliment.
'Bout five years ago I was roped into a pub quiz team with three others. One question was to identify as many of the 20 TV chefs whose faces appeared on a sheet of paper. I recognised two amongst them, Fanny Craddock and some limp-wristed herbert whose moniker escaped me. The others wrote in the names of 19 of them within a few minutes and were genuinely frustrated by their inability to recall the other's. I suspect they thought I was out of touch, or a bit dim, while I was thinking only those welded to their settees to view miles of useless crap would be so knowledgeable.