Do we agree that it is impossible for a passenger airliner to be at FL 350 with an airflow <60kts passing over the Alpha probes (from whatever direction)?
No, I don't agree. In dynamic maneuvers the airspeed can attain any value, including negative values.
AB stall warning inhibit below 60Kt should apply only on the ground.
Let's be clear about this. The stall warning is not inhibited, but the AoA signal becomes invalid (no computed data) below 60 kt. It is logical that this occurs at a certain low airspeed, because as the air speed reduces, the friction in the vane mechanism becomes more significant compared to the aerodynamic force that points the vane in the right direction, and the output value becomes increasingly inaccurate. However, IMHO when stall warning is active it should not stop when the AoA becomes invalid but should continue to sound until a valid AoA signal indicates an AoA value less than the stall warning threshold value.