でも[差「さ」]し[支「つか」]えない => It's OK if A, it doesn't matter if A N1
Need/Requirements
もしかすると/もしかしたら~かもしれない => perhaps; maybe; perchance; by any chance ~ N3
たしかに/なるほど~かもしれない => might; perhaps N3
Speculation
しかし => But, nevertheless N5
Change the subject of the story
あるいは~かもしれない => Or maybe... perhaps N4
Line up, list
~てしかるべきだ      => should; appropriate; it is natural to do ~ N1
しかしながら => however, nevertheless N2
Things do not match the prediction
ふしがある => Seem N2
Speculation
からすると/からすれば/からしたら => judging from; considering; by the look of ~ N2
もしかしたら…か => perhaps; maybe; perchance; by any chance ~ N4
Speculation
...し, ...し, ...から => and; and what's more ~ (emphasis) N4
Line up, list
~かくして => thus... N1
Conclude