Dissembling in the Bible

INSTANCES OF

Genesis 42:7-20 And Joseph saw his brethren, and he knew them, but made himself strange unto them, and spake roughly unto them; and he said unto them, Whence come ye? And they said, From the land of Canaan to buy food. 8 And Joseph knew his brethren, but they knew not him. 9 And Joseph remembered the dreams which he dreamed of them, and said unto them, Ye are spies; to see the nakedness of the land ye are come. 10 And they said unto him, Nay, my lord, but to buy food are thy servants come. ...
Genesis 43:26-34 And when Joseph came home, they brought him the present which was in their hand into the house, and bowed themselves to him to the earth. 27 And he asked them of their welfare, and said, Is your father well, the old man of whom ye spake? Is he yet alive? 28 And they answered, Thy servant our father is in good health, he is yet alive. And they bowed down their heads, and made obeisance. 29 And he lifted up his eyes, and saw his brother Benjamin, his mother's son, and said, Is this your younger brother, of whom ye spake unto me? And he said, God be gracious unto thee, my son. ...

1 Samuel 21:13-15 And he changed his behaviour before them, and feigned himself mad in their hands, and scrabbled on the doors of the gate, and let his spittle fall down upon his beard. 14 Then said Achish unto his servants, Lo, ye see the man is mad: wherefore then have ye brought him to me? 15 Have I need of mad men, that ye have brought this fellow to play the mad man in my presence? shall this fellow come into my house?