def skip_names(mol_list):
    """
    Check if a list of molecules contains nomenclature that suggests
    it can be skipped.

    i.e. lignin implies polymeric species.

    """

    # lignin - a polymeric species that can form under oxidative
    # polymerisation
    #          many forms exist. HRP produces some.

    # add white space to avoid getting the word in the middle of other
    # terms
    skippable_strings = [' lignin']

    for name in mol_list:
        for i in skippable_strings:
            if i in name:
                print('skipping this molecule because it contains:', i)
                return True
    return False