The word Disjunction is misspelled against Disjuncttion, a noun meaning "A disjunctive proposition."
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Disjuncttion has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings disjunc & ion which should not be misspelled with single 'T'
Wrong Spelling:  disjunc-t-ion 
Correct Spelling:  disjunc-tt-ion 
Check more misspelled words of Disjuncttion to spell it correct.