From what I can tell, these attitudes largely progressed through three phases. 6. Its a final breadcrumb that removes any doubt about whether he intended to leave, even if the motivations behind the move still remain a mystery. 4. He says no.
These three phases referred to in the text have the numbers 5, 9, and 15.
( z0 have :ARG0 ( z1 phase :quant 3 :ARG1-of ( z2 refer :medium ( z3 text ) ) :mod ( z4 this ) ) :ARG1 ( z5 and :op ( z6 number :value 5 ) :op ( z7 number :value 9 :value 15 ) ) )
(z0 / have-03
    :ARG0 (z1 / phase
              :quant 3
              :ARG1-of (z2 / refer-01
                           :medium (z3 / text))
              :mod (z4 / this))
    :ARG1 (z5 / and
              :op1 (z6 / number
                       :value 5)
              :op2 (z7 / number
                       :value 9
                       :value 15)))
These three phases referred to in the text have the numbers 5 , 9 , and 15 .
z1 :quant 1
z1 :mod z4
z1 :ARG1-of z2
z2 :medium z3
z0 :ARG0 z1
z6 :value 2
z7 :value 3
z5 :op2 z7
z5 :op1 z6
z0 :ARG1 z5
z7 :value 0