What aquinas said.
Anyone who's been around little kids for more than an day or so knows that they do things (or not) for their own reasons, and that assessments are unreliable for precisely the reasons your son demonstrated (little kids often don't still, and they say stuff like I didn't want to). So the teacher should know better than to make a decision based on such a quick meeting with him. Ignoring a report that presumably took a professional quite a while to put together is also a bad sign.
TBH, even attempting to "screen" such a young child based on a brief interaction with a grownup who's a complete stranger is, IMO, kind of silly.
And what, exactly, are they screening for, anyway?
