Detect abnormalities help functions
contradiction_functionsAn object of class list of length 11.
2 variables:
A_not_equal_B, if A != B
A_greater_equal_B, if A >= B
A_greater_than_B, if A > B
A_less_than_B, if A < B
A_less_equal_B, if A <= B
A_present_not_B, if A & is.na(B)
A_present_and_B, if A & !(is.na(B))
A_present_and_B_levels, if A & B %in% {set of levels}
A_levels_and_B_gt_value, if A %in% {set of levels} & B > value
A_levels_and_B_lt_value, if A %in% {set of levels} & B < value
A_levels_and_B_levels, if
A %in% {set of levels} & B %in% {set of levels}