You need to go back to your link and read it, the thirteenth word, in the heading, in bold blue letters, it holds the key, johnny man and petee boy play with words or whom-ever put PR'ed that.
I must ask you, do you understand the word tenta-tive-ly? It is an adverb. Tentative is adjective.
Other words for tentative are,
probationary, provisional, pro-visionary, doubtful, academic, assumed, figured, guessing, guesstimated, hypothetical, on a hunch, on a long shot, putative, reputed, supposed, sup-positional, suppositions, supposition, surmised, surmising, suspect, theoretical, uncertain, unresolved
1. Not fully worked out, concluded, or agreed on; provisional: tentative plans.
2. Uncertain; hesitant.
Of course, like all matters of study, be very wise, do your own Due Diligent work, test this idea, see if you can agree?
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