Static analysis, dynamic analysis and testing

Question

Based on answers I have received here and then confirmed in some authoritative sources (not ISTQB which seems to be too vague), there are 3 activities:

• Static analysis
• Dynamic analysis
• Testing

But is there any reason why we cannot combine all of that as "testing"? I mean, even a dynamic analysis review of a program to look for memory leaks is a kind of testing, right?