Suppose a physician says . . .	Possible interpretation of the physician’s statement
. . . she determined that the patient has a medical condition.	This would seem to convey that the physician has gotten a positive result from some sort of test that strongly indicates the target condition, though it conveys nothing about what, if anything, will be communicated to the patient.
. . . she concluded that the patient has a medical condition.	This sounds less like the physician is relying on a single definitive test, but rather is relying on a heterogeneous assemblage of evidence, but nonetheless the physician seems to be claiming that the diagnosis (probably) follows from that evidence.
. . . it is her opinion that the patient has a medical condition.	Now the physician sounds a bit less certain of the diagnosis. She seems to be acknowledging the possibility of alternative interpretations of the evidence but still believes that the diagnosis is the most plausible interpretation.
. . . she has decided that the patient has a medical condition.	This would sound strange to most people’s ears. Why is the physician using the term “decide” instead of one of the above terms? It sounds like some deliberate element, i.e. the physician’s preference, has been incorporated into the analysis, and this does not seem appropriate.