I think I can. For example, my old friend from grade school who I haven't seen or talked to in over 20 years found me on facebook. I looked at her profile to see how she was doing, and I swore the profile sounded a little Aspie. So then we started talking in messages, and one of her children has been diagnosed with Aspergers, and then she talked about her anxiety in school growing up. I asked her if she ever thought she might be Aspergers and the anxiety was related to that, and she said many times. So I don't know on that one. I also swore my nephew was autistic before his diagnosis (which is why he ever went to be seen), and I didn't even know much about autism back then. And my oldest daughter, I saw the Aspergers' symptoms starting from before she was a full year old, and she was diagnosed right before she turned 3.
The main thing is like you might say, "so and so has a special interest which might be a sign of Aspergers," and people respond, "all people have special interests," but you know deep down inside that there is a difference between an Aspergers special interest and an NT's special interest, and you can't describe it in words but you know the difference. Same with meltdowns, and even our temper tantrums, social behaviors, etc.
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"In the room the women come and go talking of Michelangelo." J. Alfred Prufrock