I've been seeing a lot of tweets/comments/posts with the following structure: "It's almost as if [obvious observation]".
Ignoring how terrible this trend is, what is an appropriate word or phrase for the "it's almost as if" part?
I believe there's a term for this type of commonly-used subordinate clause at the beginning of a sentence. The fact that my example is idiomatic is probably relevant to what I'm looking for. The fact that my example is sarcastic/ironic is probably irrelevant.
EDIT: As pointed out by John Lawler in the first comment, this is actually not even a subordinate clause like I originally thought.