” It should go without saying that it is the lawyer’s duty to read cases before submitting them to a court as precedential authorities. At its barest minimum, it is the lawyer’s duty not to submit case authorities that do not exist or that stand for the opposite of the lawyer’s submission. It is the litigation lawyer’s most fundamental duty not to mislead the court.”
https://www.canlii.org/en/on/onsc/doc/2025/2025onsc2766/2025onsc2766.html