Don't Care may refer to:

In digital logic, a don't-care term for a function is an input-sequence (a series of bits) for which the function output does not matter. An input that is known never to occur is a can't-happen term. Both these types of conditions are treated the same way in logic design and may be referred to collectively as don't-care conditions for brevity. The designer of a logic circuit to implement the function need not care about such inputs, but can choose the circuit's output arbitrarily, usually such that the simplest circuit results (minimization). Examples of don't-care terms are the binary values 1010 through 1111 (10 through 15 in decimal) for a function that takes a binary-coded decimal (BCD) value, because a BCD value never takes on such values (so called pseudo-tetrades); in the pictures, the circuit computing the lower left bar of a 7-segment display can be minimized to a b + a c by an appropriate choice of circuit outputs for dcba=1010...1111.

Don't-care terms are important to consider in minimizing logic circuit design, using Karnaugh maps and the Quine–McCluskey algorithm. Don't care optimization can also be used in the development of highly size-optimized assembly or machine code taking advantage of side effects.

"Don't Care" is a 1994 single by American death metal band Obituary. It was released only in the U.S., like a previous release of the album World Demise (1994). A music video of the same name was made for this song.

The song appears in the video to be a protest to man-made pollution.

Track listing

"Really Don't Care" is a song by American singer Demi Lovato, featuring English singer Cher Lloyd. The song was released on May 20, 2014, as the fourth single from Lovato's fourth studio album, Demi (2013). It was written by Lovato and Lloyd along with Carl Falk, Savan Kotecha, and Rami Yacoub, and was produced by Falk and Yacoub. "Really Don't Care" peaked at number 26 on the US Billboard Hot 100.

Composition

"Really Don't Care" is a pop song that runs for three minutes and twenty-one seconds. The song was written in the key of G major. Lovato originally wrote the song as a breakup song. She wanted to make it a more empowering song. Lovato said in an interview, "I wanted to make it more empowering. When I thought of the lyrics 'really don't care', it made me think of bullying, and made me think of the LGBT community, who deal with that so often, but they accept themselves."

Critical reception

Billboard writer Jason Lipshutz praised Lovato's sassy confidence on the track, which effectively showcases her "overpowering pipes". He also commented positively on the placement of the song on the track list, noting that "Really Don't Care" serves a "buoyant repreive" after more emotionally heavy tracks. Sam Lansky of Idolator described the song as "irresistibly spunky", but found Lloyd's short feature to be superfluous. Conversely, Melinda Newman of HitFix found the song to be too generic, comparing it to Icona Pop's "I Love It" (2012).