Crossword Clue:

MISCONJECTURE to make a wrong conjecture

AnswerCrossword Clue
ERRMake a wrong move
ERRMake a wrong choice
ERRMake a wrong turn, say
ERRMake a wrong choice, e.g.
ERRMake a wrong turn, e.g.
BIGAMISTSOnes for whom two rites make a wrong
MISSPELLMake a mistake writing simple L's the wrong way (8)