The word Presuposal is misspelled against Presupposal, a noun meaning "Presupposition."
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Presupposal has double "pp" is mispronounced as "p"
Remember double 'PP' in between the strings presu & osal which should not be misspelled with single 'P'
Wrong Spelling:  presu-p-osal 
Correct Spelling:  presu-pp-osal 
Check more misspelled words of Presupposal to spell it correct.