EXPERIMENTATION
OBSERVATION
CONCLUSIONS
HYPOTHESIS
EVALUATION
CONTROLLED
CUMULATIVE
PREDICTIVE
VERIFIABLE
DEDUCTIVE
INDUCTIVE
ORIGINAL
PROBLEM
S
O
A
A
X
A
C
O
R
I
G
I
N
A
L
D
A
D
T
W
V
E
R
I
F
I
A
B
L
E
I
M
L
G
N
B
A
R
E
U
P
Z
E
X
C
O
N
T
R
O
L
L
E
D
O
R
Z
T
E
C
V
F
V
N
A
G
O
N
E
I
G
J
O
I
I
I
G
H
M
X
P
O
I
E
E
K
B
M
E
W
U
D
L
U
T
A
M
G
U
E
N
Q
T
O
Q
Y
S
E
V
F
W
E
X
E
A
Q
K
M
I
J
I
H
A
K
A
E
E
B
A
S
N
I
I
O
T
L
V
E
N
F
O
X
L
O
I
I
R
R
L
J
P
G
O
P
N
E
B
L
D
C
E
H
U
S
S
D
V
S
U
B
R
K
D
U
E
E
E
B
U
M
E
V
M
F
I
Q
A
A
A
A
E
W
A
U
M
I
E
O
C
O
R
O
U
I
S
E
T
G
T
E
D
V
Y
P
I
I
L
R
T
E
V
E
C
M
E
R
I
G
I
S
I
I
N
E
R
M
X
P
I
R
S
V
A
O
H
J
O
O
O
E
C
T
I
Z
E
B
Q
C
V
E
X
I
C
G
T
A
N
O
N
C
T
K
E
L
P
C
I
U
E
R
O
T
N
E
O
M
Y
P
E
C
I
V
I
S
X
S
I
E
A
X
Y
C
Q
S
P
U
Y
B
N
V
V
I
P
Y
E
C
O
N
M
U
S
U
I
U
Y
Y
D
M
K
C
E
J
L
A
T
E
D
U
K
X
W
D
G
E
H
O
E
A
B
U
H
I
J
B
B
A
F
A
W
O
B
E
R
Z
U
C
O
N
C
L
U
S
I
O
N
S
Z
W
X
H
I
D
U
N
I
D
I
F
S
C
C
Q
U
X
L
T
X
E
L
E
