The phrase "affirmation may not" is correct and usable in written English.
It can be used in contexts where you want to indicate that a certain affirmation or statement is not allowed or may not be valid.
Example: "In this context, the affirmation may not hold true for all individuals."
Alternatives: "assertion may not" or "statement may not".
"The recruitment program is an affirmation in many ways for prospective students who may not think it's possible," says Greene recounting a recent visit to Spelman College and Morehouse College where even top students did not think they could apply to HGSE.
Romney may not flaunt his religion but his 2007 speech was an affirmation, never since denied, of the centrality of religion in American public life.
A retail experience in which the staff are obliged to smile about being screwed may not meet the standards of a moderately ethical shopper but it's a negative affirmation of what a powerful currency the smile can be.
Beethoven's "Missa Solemnis" may not be on quite so bold a sonic level, but it too is a staggering affirmation of faith.
Text books, research papers, and other sources of information may not be adequate to answer their questions as many times physicians are also searching for support, guidance, affirmation, and feedback [ 9], which requires a synthesis of medical knowledge, patient information, and an understanding of the context of care [ 4], especially in complex cases [ 10].
Affirmation may be graded by repeating, approving or praising the learner's act.
Verbalize positive affirmations in front of the mirror: Say to yourself "You're beautiful!", "You're amazing," etc. when standing in front of the mirror.[16] This may feel forced, and you may not initially believe what you're telling yourself, but experts tell us that this process what they call cognitive behavior therapy really does work over time.
When recommendations are so challenging that they are likely to be considered unrealistic even by those who are not in a defensive mindset, self-affirmation may encourage message rejection.
van Koningsbruggen and Das interpret such findings as indicating that self-affirmation may have 'adverse effects', but, as Harris and Epton (2009) note, self-affirmation 'is not a technique for increasing persuasion.
Private values — memories, affirmations — may well have played a role in some historic compromises.
