(CNN) -- Summon Siri, the digital assistant contained within the iPhone 4S, and ask: "Why is it so hard to find good help these days?" "I don't know what you mean," answers the robotic female voice. Despite all of the quirky, saucy and entertaining responses to oddball remarks -- like "I'm drunk" (Siri returns a list of taxi services) or "What do you look like?" ("Shiny") -- Siri is unable to deliver on many basic commands. For example, the voice-command service refuses to launch applications. ("I can't do that for you, Mark. I'm sorry to let you down.") The iPhone 4S has an improved camera and a button on the lock screen to quickly access it, but Siri is not a photographer. ("I can't take your pictures for you.") Twitter is embedded in the new version of Apple's mobile software, but ask Siri to tweet, and it says, "Sorry Mark, I can't help you with Twitter."
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Siri, Apple's voice-controlled assistant, is quite good at what it knows how to do
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However, Siri is unable to perform some basic tasks
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Apple says Siri is a "beta" and that the company will improve it over time
Yet it can't start a movie stored in @placeholder's videos app.