[rscho]

If this doc meant it in the literal sense of 'can't', why go through with the workup, then? This is IMO evidence that the doc meant 'very unlikely, but let's check'. I agree words are important, but still the right decision was made and that's cool.

[rendaw]

I think the issue is "can't" is present tense, and the conclusion _after_ treating. In otherwords, they still think it isn't a heart attack.