Yes, you can hire a lawyer and contest the will.
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The dear old man could have loved one son more than the other.
Yes, it often happens.
However, the dear, sweet old man left his son fifty bucks.
People, at one time used simply say, thank you for the gift.
These days they whine about it not being enough.
My dear, sweet granny sent her grands a crisp, new $2.00 bill on our birthdays.
I have about 35 of those bills today.
I never spent one, and each year as a child we were required to write her a thank you letter.
I kept writing mine until she passed away at age 102.
I remain deeply appreciative that she thought enough of me to send me a birthday card every year she lived, after I was born.
Those $2.00 bills will never be spent.