Apply not_TwoRamseyProp_atleast_3_4_Power_3.
Apply TwoRamseyProp_atleastp_atleastp with
5,
3,
7,
4,
prim4 3 leaving 3 subgoals.
The subproof is completed by applying H0.
Apply nat_In_atleastp with
5,
3 leaving 2 subgoals.
The subproof is completed by applying nat_5.
The subproof is completed by applying In_3_5.
Apply nat_In_atleastp with
7,
4 leaving 2 subgoals.
The subproof is completed by applying nat_7.
The subproof is completed by applying In_4_7.