This method checks that the underlying data type of an object represents a well-defined pseudo-witness set or numerical interpolation table.
For NumericalInterpolationTable: this method checks that the underlying HashTable has the following keys: hilbertFunctionArgument, hilbertFunctionValue, imagePoints, interpolationBasis, interpolationSVD, map, and that these keys have the expected types.
For PseudoWitnessSet: this method checks that the underlying HashTable has the following keys: isCompletePseudoWitnessSet, imageDegree, map, sourceEquations, sourceSlice, imageSlice, witnessPointPairs, traceTest, and that these keys have the expected types.