Using the point M_b and the point T_b, construct a line b (rule W02);

% DET: points M_b and T_b are not the same

Using the point T_b and the point I, construct a line s_b (rule W02);

% DET: points T_b and I are not the same

Using the point M_b and the line b, construct a line m_b (rule W10b);

Using the line m_b and the line s_b, construct a point N_b (rule W03);

% NDG: lines m_b and s_b are not parallel

% DET: lines m_b and s_b are not the same

Using the point I and the point N_b, construct a circle k(N_b,A) (rule W06);

% NDG: points I and N_b are not the same

Using the circle k(N_b,A) and the line b, construct a point A and a point C (rule W04);

% NDG: line b and circle k(N_b,A) intersect

Using the point I and the line b, construct a circle k(I,P_a) (rule W11);

% NDG: point I is not incident to the line b

Using the circle k(I,P_a), the point A, the point I and the line b, construct a line c (rule W13);

% NDG: point A is outside the circle k(I,P_a)

Using the line c and the line s_b, construct a point B (rule W03);

% NDG: lines c and s_b are not parallel

% DET: lines c and s_b are not the same