Executive: In order to add to our profits, I was planning to promote and distribute herbal tinctures  However, some members of my advisory staff questioned the medical efficacy of such products  So I have consulted a variety of reliable medical publications, and these likewise claim that herbal tinctures are ineffective
Ttherefore, I must conclude that marketing such products would not produce the result I intended
If a majority of reliable sources conclude that a particular substance is medically ineffective, then that substance almost certainly is medically ineffective.